I did the rebuilt on my '00 with about the same mileages as you have with yours. There are others with good opinions and I wont tell u what you should do and shouldnt do - based on my experience, the first time I bought my sled used, it ran good but it felt a "little" slow. When I did the rebuild 2 yrs ago with all new SPI pistons and rings - wow, Id tell ya, the sled roared to life, stronger and faster than when I first got it. For about less than 200 bucks, it was well spent. WL.
My neighbor used to say, " The speed that thrills, the speed that kills "