The truth is there are a lot of nice rifles around. I have 2 Savage centerfire rifles. One is a 30.06 and one is a .223. The .223 is a varmint gun which means a heavy barrel and action both of which are too heavy to carry around all day. Varminting is about setting up in one spot and picking off the varmints until you run out. Plinking is about carrying your gun around shooting whatever looks like it would be fun to shoot. I like to do both. I mostly use my .223 for plinking though. I just do it from 500 yards away.
So decide what kind of rifle you want and find out which ones suit your intended use. Then find one that fits you well. And buy a good brand if you can. Savage, Tikka, Howa, Sako, Weatherby, older Remingtons, Mossberg, Stevens, etc. will all be fun to shoot. But right now you may want to find the ammo first so you'll actually have some. It's pretty dry on the ammo shelves and .223 is one of the first calibers to go.