Currently I shoot a Hoyt Trykon from 2005.   It shoots accurately and has always done what I've asked of it.   It has helped me take quite a few deer over the years.

That said I feel like its time to upgrade to a new one.   The new bows are so much better and I have the money strashed to buy a new one but I feel like I'm leaving my old friend behind.   

How do you guys decide when its time to upgrade your setup?