It will be hard to beat the Savage. If down the road you want to change calibers all you have to do is purchase a barrel that is already threaded and chambered and with a vice and barrel nut wrench you can change the barrel out in less than 15 minutes yourself. You really don't need head space gauges. Take a FL sized case put a couple pieces of scotch tape on the base of it put it in the chamber screw the barrel in until it stops and tighten up the barrel nut. You can also get new bolt heads to change from mag down to 223 size. Basically the Savage is the big boys tinker toy set.
I forgot to mention they really shoot well.