My first suggestion would be to turn into a Reloader. This gives you a lot more options regardless of caliber. Personally I would stick to the 7MM UM. You really can't improve much on that. My next Idea would be to trade it for a 300 Win Mag. That will give you many options without reloading and in the field, all you loose is a little recoil. The rebarrel should work if you really want to go that route. If you dont reload the 300 UM then the gain over the 300 Win Mag is slim, REAL slim.