RE: 270wsm or 25-06
I have a 270wsm and I like it. Haven't had the chance to take it on a hunt yet, bought it for next year, to give me time to get familiar with it. If you think you'll have the need for the heavier rounds I'd say go for it. Out of curiosity, why aren't you also looking at the standard 270?
The only downside so far is ammo availability. You might have to work a little to find what you're looking for. Hopefully that'll improve.