Have you considered a 270 Winchester ? Either Remington Model 700 or Winchester Model 70. I love the 270 so much that I have 3 of them, most recently purchased a Winchester Model 70 extreme weather, stainless with a black stbthetic stock, fairly light but it ran me 1,300 just for the rifle. Remingtons mountain rifles are light and nice to pack around and are offered in several chamberings. Winchester model 70 Classic Featherweight's are also very light and easy to pack around and are also offered in several chamberings. Ruger M 77's are also very good rifles but not real light. All of the calibers suggested in previous comments are all good calibers, 243, 25-06, 270, 7MM. My advice would be to go to your local gun shop and hold a few different rifles and then decide what rifle you like in the caliber that you like in your price range. Hunting rifles are alot like trucks, every hunter has a favorite one and opinions are going to vary drastically