I have had the Cheetah Mkl and Mkll. Also a couple of 22-250AI's. To me, the most sensible one is one I have not tried yet, the vanilla 22/243 although the 224TTH (22/6mmAI)is calling my name as well. I liked them ALL so far, and the faster the better for me so far but once past the 22-250 one really needs to go with a faster twist bbl and use the heavier bullets to see any real gains. Not a nickels worth of difference in how fast any will push a 40-50gr bullet, and surely no real world benefits. That said, it IS really fun to blast small rodents with 36gr Barnes Varmint grenades started out at 42-4300fps
