K5 and current GSXR build quality is tops! And the R6 has the most aggressive riding position ive ever felt. It scared me touching the brakes. GSXR has a more relaxed position and better for tall guys like me as your arse isnt 10ft in the air. Never been on a 675 though, but ive heard they are well set up for daily riding. Look a bit dated now though
+1. Its a bad idea, you wont have insurance