RE: thoughts on 25-06 for hunting deer
The 25-06 is incrediable on deer. Get it and you won't regret it. I have a friend who shoots a H&R single shot in 25-06 with the 26" barrel and routinely kills deer out past 400 yards. Great rifle.
The 7mm-08 and the 308 are great too but you already have a 270 so its really pointless to get anything larger then the 26-06.