I shoot the Powertec and love it! It is smooth, and very accurate. Last winter my team tied for 1st place in a indoor 3d league and most guys were shooting a bow considerably more expensive. It has served me well in the field also. It is not a speed bow however, so if you plan on shooting a large expandable you'll have to crank up the weight.

I dont know anything about the bowtech though, it could be a great bow.