I currently have D40 and I'm pretty happy with it. It has a few annoyances here and there, but nothing too major. I was looking at some reviews of the D80 and pricing on Amazon. I saw this deal from Cameta Camera and it seemed pretty sweet. (They have a 97% rating on amazon and they are gold on resellerratings). The cost to get two more lenses for the D40 would be around the same price of upgrading to this Kit after selling the D40. Is the D80 paired with both a Tamron 28-80mm and a Tamron 70-300mm worth the selling of my D40? Thanks in advance.