I would recommend:
Savage 10/110 w/heavy barrel
Remington 700 SPS Tac is 20" heavy; ACC is 20" w/heavy & threaded and add a Bell & Carlson stock
Remington 700 5R w/HS Precision stock (good barrel, ok stock) Check them out at Mile High Shooting Accessories!
Tikka are supposed to be real nice, but not a lot of aftermarket stuff

All would do fine for what you are looking for and leave you money for glass (and bipod/LRF/Spotter).
You can add detachable mags, triggers and tons of other parts as you see fit.