i rode a 600 for 3yrs then raced it technically teaches the rider to go hard out in a fun but serious bike, however eventually you always going to want a new toy right! im now on a thou i ride it at the track on the road you adjust to it,sure it was a beast initially and you got to take it easy and take a couple of steps back,but it 6mnths on feels almost 600ish now its got soft rubber on it,i had a 750 for commuting, weekend rides, or trips was awesome sportsbike,
ride safe.