Im about 6'0" and 260 lbs and owned an r6. Not the most comfortable ride but way more flickable around the corners than an R1. I've ridden both 600cc and 1000cc bike. I actually prefer the 600 for fast pace riding in the mountains and 1000cc for posin at the beaches for bitches
Also first mods always to a bike is not a fender elminator, turn signals, windscreens, or exhausts but rather should be steering damper, stainless steel braided lines, and rearsets.