Reddit mentions of Definitive Technology ProCinema 600 5.1 Home Theater Speaker System (black) (Discontinued by Manufacturer)

It's not an all-in-one. It's a bundle of this speaker set and this receiver.

Yeah man. In my experience this is not the sub for out of the box home theatre systems.
Everyone on here will advocate the purchase of a receiver and speakers accordingly. I have a denon receiver, mirage front speakers, klipsch channel and sides, and JBL rears. Oh and onkyo sub. It really doesn't matter how many different brands you use as long as they are paired up. Meaning you don't want a front left JBL and a front right Polk.

5.2 Is a bit of a strange request for an out of the box. I would recommend buying a decent receiver for around $200-300. And $700 on speakers. Now you can buy speaker sets in Amazon and other places. I'd recommend these. Definitive Technology ProCinema 600 5.1 Home Theater Speaker System (black) https://www.amazon.com/dp/B000TDENA6/ref=cm_sw_r_cp_apa_B5zZzbKFQM6R8

I'd also recommend using Amazon warehouse deals. Great prices and if it fucks up send it back.

If they are looking for something small with big sound Definitive Technology does a much better job at a much better price.

Ok so now we are filling in the blanks. You have $1000-1500 to work with and you need to keep to a smaller satellite form factor. Honestly for that amount you can really start to look at some good stuff.

• SVS Prime Sat 5.1 set $1000 this gives you some great smaller speakers with a real deal sub. No worries about not reaching down with these as they reach into the 60's.
  
  
• DefTech ProCinema 800 $930 Very capable set that will reach down into the 50's for the sats. Matching sub included that is also on the small side. If you need a smaller lower cost options there is the ProCineama 600 set for $670.
  
  
• BOSTON ACOUSTICS A2310 HTS 5.1 $500 great looking small books/sats with sub. These will reach down to 80Hz so again you're doing much better than the current sats.
  
  
• KEF E305 Open Box $700 KEF Eggs at a great price. These only reach to 90Hz but that is a good bit lower than the current sats you have.
  
  
• Focal Sib and Cub set $800 These guys will reach down to 75hz so again no worries about blending with the sub.
  
  Any of these should do very well and be quite an upgrade over what you have. They will also leave plenty of room in you budget for accessories or whatever else you may need. The fact that they have a matching sub included is also nice as it should complement each of these speakers nicely. This is less of a factor as they all reach to less than 100Hz so really an sub should do fine.

Sure. Same receiver but this speaker set: http://smile.amazon.com/Definitive-Technology-ProCinema-Center-Speaker/dp/B000TDENA6/ref=sr_1_5?s=electronics&ie=UTF8&qid=1420659694&sr=1-5&keywords=definitive+technology

I think that will suit your requirements and these will sound better than the Klipsch speakers. As others have posted here, www.monoprice.com for speaker wire and other needed interconnects.

I'm guessing you are talking about the Pro Cinema 600 5.1 set or something very similar. That would be a much better choice, for sound quality and value, than the steel balls with a single driver inside.

Do you already have a receiver/amp to power the speakers?

Is this the ProCinema you were talking about?http://www.amazon.com/Definitive-Technology-ProCinema-Center-Speaker/dp/B000TDENA6

Also how important is it to have amplifier in these speakers for movies and TV watching with occasionally weekend music listening (60's-80's music & classics/jazz)? I'm hoping to avoid making things complicated for them. They currently have bundled home theater system from Samsung that they bought 13yrs ago and pressing a random button literally makes it unusable for them unless I come over and just press couple of buttons.

With the one you suggested, it looks like all it needs is power on and off button and connection to TV and bluray player.

Forgetting about the brand Bose for a minute... 800 sq ft is a relatively huge space that will require large speakers/amps to get good low end frequency response. You're gonna want larger than 2.5" speakers.

I would personally consider adding walls to make a smaller theater room.

Here's what I would get for $700: https://www.amazon.com/Definitive-Technology-ProCinema-Theater-Speaker/dp/B000TDENA6/ref=sr_1_1?ie=UTF8&qid=1519486105&sr=8-1&keywords=definitive+technology+procinema+600&dpID=41xwccTfidL&preST=_SX300_QL70_&dpSrc=srch

$ 1,000: https://www.amazon.com/dp/B001JQZXCO/ref=psdc_3025451_t1_B000TDENA6

However, you are still going to have a problem getting low end response due to room size.

Ah, ok, thank you for that info. I'm looking at upgrading my whole entertainment center so just kind of testing the waters here and trying to read up on stuff but some questions are harder to find than others. Would these speakers be a decent step up or effectively the same? Definitive Technology ProCinema 600 5.1. A friend had them and they seemed alright. I know I'm not an audiophile but still would like a good set-up that won't break the bank(sub 2000). Thank you again for your time!

These are great speakers and they are smaller than the B&Ws you were looking at.

http://www.amazon.com/gp/aw/d/B000TDENA6