I have a VXR 31.5 which feels about the same as a V3X, and a Lift 29.5.

My VXR is smoother and is more dead in the hand after the shot, but it is slower, louder and heavier.
My Lift has a stiffer draw cycle and jumps forward more at the shot, but it is faster, quieter and lighter.

Both were equally easy to tune. I would shoot both and see which feels better to you.