What charlie b said.
'98 Mausers have a look that I can't resist. Enfield's have some of the smoothest bolts I could ever wish for in a military rifle. I loved my Garand but it was just plain heavy.
I'd opt for one with a decent market for components; 7 or 8mm, .30/7.62, .303 would all be fairly easy to feed and a lot of different makes/models to choose from.
Is there a particular country or conflict you had in mind?