RE: 2007 Ezzy Wave
Well, I use the Smack myself, right now in 5.3 (see my avatar, more pics on http://www.olah.se/Windsurfing/Asa_061111w/index.html). Its a real good amalgam of smoothness and power, thats for sure. The Smack will not go 100% neutral either, not like an SO, but it gets close and in fact I think the more solid pull helps be keep more even pressure through the bottom turn and hence helps me carve a better arc. This is especially true in conditions where sail power is part of driving power. The 06 Smack had a bit of "snap" when the battens flipped, but the 07 is silent and much smoother and also has a tighter front end which is great for light wind pumping.
Good luck in choosing.