Roadrunner: You'll be wasting, or rather misallocating, your gun dollars if you get a .30-06 in addition to your .308, imo. The .308 was designed to duplicate the performance of the '06 in a short action case, iirc. The performance of the two is so close that they nearly duplicate each other.
I like the idea of the .300WSM... better long range performance, in a short action caliber that doesn't need a 26" barrel (the Browning A-bolt has a 23").
.35 Whelen: This is one that I'm not familiar with, until just reading two very solid recommendations of it by experienced hunters. Especially if you hunt in thick woods and shorter ranges (up to 200 yds +- ?), it seems like an excellent choice for deer, elk, or even moose, with less recoil than the .300 Ultra, or the .338. Not as flat shooting of course, but great for timber. I've read enough great things about the .375 H&H that it seems like a good choice, too (though much stouter and maybe 3 notches up), if you're looking for a heavy rifle that could do duty for bear or other dangerous game.
Oh, the choices we have to make
Of course, there's still no substitute for putting the bullet (a well-chosen one at that) where it needs to go. I'm gonna spend more time practicing this year for sure.
