Haj,
At the rate models are introduced you're always going to feel like you're overpaying. As long as you're not buying the day something comes out you're probably not doing badly, IMO, so just find something you like, buy it, and then ignore the temptation to see what it's currently selling for. Odds are whatever you buy is going to be phased out and upgraded, retooled or whatever within 12mo. It's borderline insane what Nikon and Cannon have been up to for the last 5 or 6 years and I don't see how it can continue.