Just my opinion...but I'm not a fan of the 7mm mag. Don't mean any offense by this, but I just have never been impressed with the performance you get for the bang.

I like the 243, if the shots are open. (25-06 is a much better caliber, though. A 120gr out of a 25-06 is great for deer...and a 80 grain plays hell on varmints.)

The 308 is also great. The 165 grain core-lokt is one whale of a bullet.