Well I know the RXT is a cadillac of seadoos. I work on an 05 for a friend of mine and the thing has all sorts of power and speed. Tows people on inflatables like they weren't even there, holds two or three people with ease (depending on size of person of course), and is very stable in the water. I also work on an 02 GXT, but it's not supercharged. It still is a good machine, just not as fast.
Be aware of some of the "glitches" in production years. The older machines have hollow valves that CAN fail. It's not guaranteed but they have been known to, especially if they get corroded from lack of proper winterization or if the ski spent a lot of time in the salt water without being fogged or flushed properly after. Also the older machines had ceramic washers in the superchargers which are known to fail as well. If the s/c has been rebuilt on a machine you are looking at buying just be sure to ask if it has the upgraded steel washers. If it hasnt been rebuilt and it's before 08 I believe it is it most likely has the ceramic washers.
That's all I can think of. From a mechanic's standpoint, the 4-Tec Rotax motors are an incredible motor and will give years of solid performance and stability if they are maintained well.
