Reddit mentions of Sram PC 951 9-Speed Bicycle Chain with PowerLink Chain Connector, Grey Links

I built up a Disc Trucker last spring. I stuck closely to Surly's build in the gearing department as it mainly is a touring bike. I went 9-speed because the chains are a touch more durable and when you get into 10-speed, Shimano's road and mountain offerings start having some incompatibilities. With a 9-speed drivetrain, you can mix and match road and mountain to whatever extent you like.

I actually have two different gearing setups. One for true touring with a mountain rear derailleur and an 11-34 cassette and another with a road rear derailleur and a 12-26 cassette.

Here's relevant parts off my list:

|Part|Model|Other|Notes|
|:---|:---|:---|:---|
|Crankset|Shimano Deore M590|175mm arm length|Has the trekking gearing 26/36/48 and Hollowtech because why not.|
|Rear cassette|SRAM PG-950|11-34 for touring, 12-26 for commuting|Yes, as far as casettes go, it's a heavy bugger. But when we're talking about LHTs, who really cares overly much about weight? As a side note, you'd need a mountain derailleur to use the 11-34, but you'd be just fine with the 12-26 for your 105.|
|Shifters|Shimano Dura-Ace 9-speed bar-end||If you're using this for touring, I'd recommend the bar ends. Otherwise, get whatever brifters you like, use a couple of Travel Agents and get some V-brakes.|
|Brake levers|Tektro RL520|Long-pull|Those guys are long pull, so they work with V-brakes and mountain-pull disc brakes. Ergonomics are decent, if a tad too pointy for my tastes.|
|Handlebars|Salsa Bell Lap||No longer being produced, sadly.|
|Saddle|Brooks Champion Flyer||I've put thousands and thousands of miles on this saddle. Love it. It's a little heavy if you're doing light commuting. For daily commuting and touring, though, it's hard to beat.|
|Pedals|Shimano M520||They're pretty low on the totem pole as far as component level, but I've had nary a problem with multiple sets. Clipless that won't break the bank.|
|Chain|SRAM PC-951||It's a cheaper chain more than adequate for commuting and touring.|

All the drivetrain stuff is 9-speed, but you can find the 10-speed equivalents rather easily. In your case, if you're not setting off across the country or across the world on your LHT, I'd say go for a set of brifters. If you want to go 9-speed, I'd look for an older set of Ultegra shifters. For 10-speed, I'd keep it 105 or above...or Rival or above for SRAM. SRAM has a lot more tactile feedback on the shifts while Shimano tends to be smoother. I prefer SRAM, but to each their own. Bar-ends are great and low maintenance, but not being able to shift from the hoods can get a little annoying after a while.

As to online retailers, a lot of parts can be had reasonably from Amazon. I also use Jenson USA. They ship fast, have free shipping on orders above $50, and price match on parts. I use Nashbar occasionally, but their shipping department is woefully slow and I avoid buying from them whenever possible.

http://www.amazon.com/SRAM-P-Link-Bicycle-Chain-9-Speed/dp/B001A0A8KG