i am getting back into riding after a 5year break. i am looking at getting a bike for trails 99% of the time with an mx track (informal riding with friends only not a race) maybe once or twice a year. i grew up on a '92 RM 125 however, i do not want that kind of on/off pipe power. i have been looking at several 4strokes and the KDX 200. just recently a friend was talking about the smooth power of a 300exc. that is exactly what i am looking for, SMOOTH POWER. i know the quality of the KTMs and after reading some the posts it seems that the 200, 250, and 300EXCs are smooth. which one would be the smoothest from the top to the bottom. which one would be the most rider friendly for a person just getting back into riding? are all three engines reliable (i want to be riding not wrenching so i mean KDX reliable or are they more like maintaining my old mx bike)? i will be buying either a new leftover '04 or a new '05 so i can control the break-in and maintainance but i don't want to pay the price for one of the EXC RFSs. i live in washington state and we have everything for terrain including mountains, big hill climbs, sand, tight timbered single tracks, wide open fire roads, mud, snow ect. ect. i am 5'7" tall 180lbs and very athletic. when i was riding 5years ago i would have considered myself an intermidiate rider but it has been a while.