RE: Bowtech Allegiance 2006 vs. Allegiance 2007
They shaved 8oz off the bow and added a new grip for all 07 bows. I can't say how this compares to 06, but I've been shooting my 07 for about a week and thus far it has impressed me. I'm coming from an 05 so there were many major changes since then. I'm shooting the smooth mods and the draw cycle, even at 70lbs, feels about 3-5lbs less.
If you're shooting an 06, you might want to hang onto it another year or two. Bowtech is ever changing. Who knows, they might all be center pivot bows by 08.