Joerm,
My first gun love was and still is bolt action rifles. Curiosity got the better part of me, so I went to the Ruger website and looked up your rifle. It looks nifty. I'll second the Weaver 3 x 9, which will fit your budget. I noticed the All American comes with scope bases, but nothing was said about rings. You'll probably need a few more bucks to get rings.
Ruger makes fine firearms. I have a Model 77 Mk.II Ultralight .308, two Red Label 12 gauges, and a couple of their .44 Magnum revolvers. I love all of them.
Your .270 will be a versatile rifle and serve you well, as would a 30-06, .308, or .243.