I would suggest that you first go to your local gun shops and sholder a few rifles to find a make and model that suits you. The next thing is to get one chambered in either 223 or 22-250. Ammo for the 223 and 22-250 will run about the same unless you are going to use surplus ammo. 22-250 has an edge on the 223 for performance.
Personally, I shy away from the surplus ammo. Some of it is corrosive and usually not as accurate as civilian. If you intend to shoot a lot, then reloading will definately be something you should think about.
Just an observation: If you reload, it never seems to cost you less..........you just shoot a lot more for the same price! lol.
No such thing as a stupid question. What is stupid is not asking it.