Superb review as always Frank.
In a nutshell w/ my limited experience w/ the ViperTec, I came to the same general conclusions as you. Very, very smooth shooter, a little bouncy on target, and speed is...
. Very nice machining on the new risers this year for sure. Hoyt continues to improve their machining year after year!
I think the X-tec will run neck and neck w/ the ViperTec for sales if folks are able to compare them side by side; IMO the X-tec is the better mousetrap, and in the shop already it has found more proponents than the ViperTec has..not just for speed, but for aiming/stability as well. The few extra $ are worth it AFAIC.
Just wish you'd do a 5 grain test on your bows..buy yourself some CX300s for cryin out loud!