Ya know, that's really a tough one, and a personal choice. There is so much involved in the purchase of a new bow......First is money! You just don't get a heck of a lot for a trade in anymore because the technology is changing so fast, everybody wants the "latest and greatest." I buy a new bow (or 2 [&:]) every year, but I have the luxury of working in a pro shop which makes that MUCH easier to do. I basically just trade in my "old" one for a new one. Done.

I dunno......I guess every 2 or 3 years is good....That would be enough for it to be a significant upgrade.