I'm not sure there's anything more to really add that iowaqdm didn't say already. Good piece of info! Although I wouldn't discount a .270. It's a bit more than what you need for varmints, but if you'd like to use the rifle for something other than varmints..deer or antelope, a .270 might be your gun. Ballistics are still there for longer range varmint shooting.
I went with a .270win short mag. Why? Not sure. LOL I loved the ballistics on it and wanted to buy a gun that would cover a few different animals I may hunt in the future. If I can suggest one thing though. Don't worry about spending a ton on a gun. If your not into the looks of a gun, Savage puts out a great shooting rifle at a very good price. Spend all your available money on optics(scope)! Others can chime in if they agree or disagree, but really good optics is the way to go. Can't shoot what you can't pick up in the scope and shoot. Find a scope where you can pick up an animal with ease, has a good eye relief and great light gathering capabilities. If you don't want to toss out the BIG money, I would look into something in the Nikon Monarch line. The glass isn't that far behind a Leupold or Zeiss. I have a Zeiss Conquest 3x9x40 on my 30.06 and if I could afford a 4.5x14x44 for my varmint rifle...IT WOULD BE ON THERE! Awesome glass and picks up the slitest amount of light.
Good luck!