I own two V-Strom DL650s (yeah, two) a 2012 & a 2013. I do all of my distance rides with them. Between the two currently 80,000+ miles. I camp about half the time & always carry camping equipment. They are pretty much bullet proof as far as reliability. They are nibble enough for all road surfaces, have decent fuel capacity & mpg. I think the 650 has plenty of power & torque for all but the most technical riding.
IMHO for LD riding the most important farkles are about comfort. Custom seat, touring windshield, highway pegs... Next, important is protection; crash bars, hand guards, skid plate,... Next is capacity; side cases, topbox, tankbag, tank panniers, waterproof duffles, etc...
GPS, hydration, heated liners, accessory & safety lighting, are also important....
The more I travel, the more I tinker with my setup.