I have a mathews SQ2, i shoot 30" draw at 60# im currently shooting about 270f.p.s. im thinking of buying the switchback but dont want to lose any speed or forgiveness of the sq2 8 1/2 brace height any suggestions?

Tough decision. I'd be curious as to what the arrow weighs that you are getting 270fps.

The Switchback is very smooth and plenty fast at 30" draw. I would expect it to be faster than your SQ2. But it also has a shorter brace height. I tested a 29" switchback at 70# with a 412gr arrow and it shot 285fps. At 30" I would expect about 10fps faster.

I shoot a switchback and it is the smoothest bow I have ever shot and fast too. I recommend the switchbach 100% you will not be let down