The biggest problem I see is the cost to rebarrel a $269 rifle. I think you would come out better to buy a rifle that is already in the caliber you want.
The .270, while maybe not the ideal caliber for elk and bear, has certainly been successful at harvesting both.
The .270 is really a great caliber and gives up nothing to the 25.06 unless you intend to use it as a varmit gun, where the .25.06 with the ability to shoot lighter bullets a little better would make it more useful for groundhogs and such. However, there have been a few posters who have loaded a 90 grain in the .270 and say they get acceptable accuracy, and thus a very good varmit gun as such.