There is nothing wrong with 7RM for long range, I have a PSS in 7RM that will put 162 BTHP's into a nice hole, and has a flatter trajectory and less wind drift than a .308 ever will. The downfall with 7RM is the lack of factory loaded "match" ammo, as the only manufacturer I know of is Black Hills, and it isn't cheap. If you load your own, you are far better off.

If you do reload, your options with those two rifles is pretty limited as far as stocks and ...not much else. A quality gunsmith can take care of your trigger and bedding just fine, and if your accuracy is lacking with the factory barrels (I have seen many 77's shoot just as well as other brands), you can have it re-barreled for less than the price of a new 700.

If you decide to go the new rifle route, do not overlook Savages. "Out of the box", I have had far more success with Savage than Remington in the accuracy department. The money saved can be used for a better stock (where Savage does skimp) and/or better glass.

My $.02.