I have to say that FOR ME, I think that if I still had a bow with the more circular cams I would get a new one because the more modern "extreme" cams give you so much for speed and energy. Every so often there is a "break through" that makes it worth it TO ME to buy a new one. I just don't think there has been that new break through since I bought my MathewsUltra IIso why spend the money? Again, this is all total personal opinion and if I could get a new bow for some super steal I would do it in a heart beat just to tinker around like someone else mentioned.