If you want to spend the money, I'd go GAP Non-typical in .260, 7-08, or at most a 7WSM/7RM.

If bang for buck is important, then something similar to Tanner or Dober's suggestion is a good idea. Rem 700 is great to build off of, and Win 70 EW in 7WSM would be great to toss in a McMillan stock and go.