i just bought and rode mine little over 500 miles the 600 is great in the trails I rode with an 800 ho, and 800 polaris, yamaha apex, 700xcsp, and an 800 storm and through the trails didn't have any problem keeping up you like VT said i didn't notice any diff between the 800 and 600 rode both till really 75 or so but with me @ 210 lbs the 600 on the dream o meter stock would push 98 mph without a prob. is a fun trail sled no doubt but if you are not used to the rev chassis it will take some time getting used to. I think they feel cheap compared to the older chassis' but I still haven't got everything tweaked jsut right and I am coming off the m-10 which I rode the last few years. but even after a 240 mile ride there is no stiffness or sorenest felt great huge improvement ove rthe old style. depending on miles the 03 had a ring prbolem not sure if the early 04's did as well might want to ask if he had the recall done or ask if there is one at the dealer. other than that and the fuel guages never read right they are not bad.
If you have fear you will never live life to its fullest. So conquer your fear if you have one,only then can you truly live free.
05 gsx 600 HO mostly stock.