Upgrade when your confidencse in the bow begins to fade, or you get the urge to try something new.

As often as you want to as long as you can afford it.

I am saving to buy a new bow before next season. Here is my question The Hoyt Vtech is one I am considering. How long will this model be for sale at the dealers? When would be the best time to buy it? Will they discount the price when the newer model in introduced?

Wait to see what they come out with in 2006. If you see something that really catches your eye go for it.