RE: top choice out of 3 25-06 7mm-08 or 7mm mag
I would also vote for the 7MM-08. Amazing efficiency. Although not listed in the original post, I would also tend to look at the .270 WSM. With the new bonded bullets (Scirocco, Accubond, Trophy Bear Claw) available in this caliber, the .270 WSM will cleanly take everything from whitetail to elk and do so without a lot of recoil.
The 7MM-08, despite all its virtues, is not as good of a long range big gamerifle asthe .270 WSM. If you are limiting your shooting to 300 to350 yards, however,stick with the 7MM-08.