I have spent quite a bit of time on all three and I have 3 30-06's, and a half dozen .308s and Nagants.
The 308's and 30-06's cost allot more, but are not as accrate as the 7.62x54R for me.
I have got a rapid fire 17 shot group at 100 meters that stayed in 3.5" with S&B factory ammo. The barrel got so hot, the oil came out of the 91/30 military stock. This is a $50 rifle with a $7 AR-15 riser that I milled into a scope mount. It cost me $15 to get the bolt handle welded.
Let's get one thing straight though, that gun is ugly.