I can tell you (as a former '07 Allegiance owner) that the grip difference between the '06 and '07 is the only difference I know of......with the '07 having the better of the two.

If I was in the market for a bow.....I'd jump all over a new or used '07 Ally. I may own one again in '09. So far.....it's the BEST all-around Bowtech I've shot.....and I've shot all of them.

Good luck.