Reddit mentions of Nelson-Rigg SR-6000-HVY-03-LG Stormrider Rain Suit (Black/High Visibility Yellow, Large)

Height should be your biggest concern.

I'm 5'11", with kinda short legs, too. I couldn't ride this bike if it were any higher. You can get lowering links, and a different seat, and you should be OK - right about where I'm at, but it may never be "like a glove" comfortable.

It will totally get the city job done. Little box on the back, and you're good to go. When they hit potholes, and nearly lose it, you'll float over like nothing. Mine is a daily commuter and a weekend warrior. There is nothing this bike won't do "pretty ok".

Riding is riding. Unless you're trying to keep up with people doing 80+, you'll be just fine. The bike is as much fun as any other bike on the street at <60mph. I've ridden with groups of guys on harleys, groups of older guys on Can-Am and Goldwing trikes, adventure bike groups, groups of kids on dirtbikes, families on atvs, and in giant packs of streetbikes on weekend evenings.

Travelling far distance ... don't do it unless you're comfortable on a bike already. Riding for hours on end can play tricks with your concentration and whatnot. If you must, and you're not that experienced, plan on a 15-20 minute break for every hour riding. Just do it.

Here's some shit that I learned the hard way:

Change the oil/filters before you go, and check the plug. Check your air filter after 1000 miles of highway/trail. Plan your trip to avoid interstate. You will be much more relaxed on smaller highways, and you won't have as many trucks and their drafts to contend with. Calculate your gas mileage at every fillup. Little problems can show up as dropping mileage before they become big problems. Put some flat stop in your tubes. Give the tires a push check before starting every time. Bring rain riding gear, and hope you don't need it. Get a throttle lock. Either a good one or a cheap one. The KLR will vibrate your hands numb, you will need to get your hand off the bars for a bit. Wear a camelback water bag. A good GPS/phone mount that offers visibility without having to look away from the road is really nice when going through unfamiliar towns. Make sure you have a usb charger if you don't have a 12v socket. for your gps/phone on the bike. Carry extra cheap eye protection. One of those ATV seat pads can help if you get a sore ass easily. Don't beeline it to your destination - make a point to include a side-trip up a mountain or something as often as you can.

I think you'll end up liking the bike, and you'll end up going on that "adventure" ride sooner than you think :)

Lanesplitting is as easy as you want it to be, with no panniers. It starts to get hairy above 60, because after that the KLR just doesn't have the instant go that you need to zip through smaller spaces. So at those speeds, you're more like a cruiser bike. But at city speeds, once you've been in the saddle a few months, it feels really small in traffic.

I wore a suit every day commuting back and forth to work along a bayou in Houston rain or shine for two years.

I got some gaiters (these are awesome)
https://www.amazon.com/gp/product/B00YHPGHGU/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

A rain suit (This one is decent)
https://www.amazon.com/gp/product/B0068ERNNE/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

and some boot cover (Not crazy about the durability on these, wearing rain boots and keeping dress shoes in backpack is probably a better option)
https://www.amazon.com/Waterproof-Springtime-Rainstorm-Rainsuit-Motorcycle/dp/B005DJFXY6/ref=pd_bxgy_img_2/134-4971694-3928756?_encoding=UTF8&pd_rd_i=B005DJFXY6&pd_rd_r=f0b5fdde-1d39-4be5-a589-852783c72ca6&pd_rd_w=USqsP&pd_rd_wg=oKe0f&pf_rd_p=a2006322-0bc0-4db9-a08e-d168c18ce6f0&pf_rd_r=FPDCQZVR7AZJ2YB9E2Y5&psc=1&refRID=FPDCQZVR7AZJ2YB9E2Y5

I wore a dirt bike helmet with the rain suit hood over it.

Bring a towel and a backpack, dry everything off and stuff into back pack, wring out towel and hang it to dry in office.

Bike had a set of fenders.