All of the replies are spot-on as far as I am concerned as I am an old-timer and grew up with beautiful wooden stocks and the classic deer calibers. But beauty is in the eye of the beholder as they say, and lots of younger hunters, like yourself, like the modern looks and adjustability of the AR frame. There are are after-market synthetic stocks that are totally adjustable and they can be used with the better (and universally legal) deer calibers on bolt/barreled action, so you can have the best of both worlds. There are also AR type rifles that are built with excellent deer calibers (like the .308 Win., for example). I applaud you for wanting to use a rifle that fits you as this important feature is often overlooked by new hunters. My only STRONG recommendation is that you stay away from the .22 calibers for deer. I may start an argument here, but regardless of whether they are legal for deer in the area where you will be hunting, and although they can kill a deer, they just are not deer calibers, and many would say just not an ethical choice. I have seen deer hit with much bigger calibers with well-placed shots run long distances and even get away. Trust me, for an ethical hunter it's the worst feeling in the world, and more likely to happen with the .223 or similar bullets. Best luck to you and good hunting.