Griz,
I'll throw in my $.02 worth and agree with the previous poster on the .308 over the .30-06 for saving powder on reloads. I have both and, while I prefer my NEF .30-06 rather than the Winchester 88 in the field, when it comes time to load up some brass I like that short, fat cartridge.
A friend of long ago who is now in the happy hunting grounds swore by the 7x57. He was the ultimate woodsman, living in the bush in interior Alaska. If he didn't shoot it, he didn't have meat. His was also the first rifle I saw with the "scout" scope installation, putting a pistol scope out forward on the barrel. That was in 1969.
Another suggestion: instead of the Ruger go with the NEF in .30-06. For $100 or so they will fit a .308 barrel to it. It may not be as nice as the Ruger, and it's a break open action rather than falling block, but for the price of the Ruger you can have the NEF and a bunch of barrels, too!
You really should reload, by the way. A cheap Lee Loader in the caliber of your choice goes for $20. Get a scale rather than relying on the dipper powder measure. Lee has theirs for $30 (I push Lee for price, but there are other brands out there) so for $50 + components you get a good start at learning the reloading game. If you want a little more sophistication get Lee's Hand Press ($27) dies ($27) and Auto Prime (along with the scale). Lastly, get a reloading maual and you have a complete reloading set up which doesn't need a bench. Both the Lee Loader and hand press work fine at the kitchen table. Those are Lee's prices, by the way. My Midsouth catalog shows a BIG savings.
Let us know what you end up with!
-Kees-