passthru, I just upgraded from on 05 to an 07. There is actually quite a bit of difference IMO. Some aren't different from 06, but if you're thinking of going 05 to 07, its quite a bit. The ability to swap modules is a bonus. The smooth mods are very nice. I"m shooting mine at 70lbs and not having any difficulty. I'll turn it down shortly, but so far, so good. The offset limb pockets making finding a rest that will fit much easier. The center shot has been pulled in to the riser some to help this out tremendously. The weight has gone down 8oz. Doesn't sound like much, but its actually pretty noticable. So far, I'm thrilled with mine.