I have a 1996 PSE Thunderbolt that I had no intention of upgrading from but a friend was selling a 2003 LX Matthews for $250.00 that I coulden't pass up. So I guess I upgraded by default. I think most people upgrade because they think their missing somthing by not having all the Bells and Whistels. But for me if it still kills deer its for me. With the new (to me) Mathews I began using carbon arrows for the first time. I shot 6 deer with my old PSE and aluminum arrows last year so do you really think I needed the update. Good luck in which ever you decide. Mike