Well it depends on what type of elk hunting your going to do? Are you going to haul it to your spot by foot or by wheels? This would change my opinon on bbl size and weight. If there is no price limit i would look into a ABS carbon bbl, you can have the stability of a large dia bbl with the weight of a std varmint contour. Go with a 1.250 dia with a tapper to 1" at the muzzel, 28" or longer. Add a three or four chamber muzzel brake to finish it off. The barrel will be around 5# in this size. I use 1.400 breech tappered to 1.100" at the muzzel on most of my 338 snipe-tac rifles, these barrels are around 5.5# 32" long, i also add a Titanium muzzel brake to keep the weight down.
Triggers...lots to choose from, basic 700 rem. Shilen, Basix, Jewell, ect.
Stocks, well Mc Millan if you want to wait, i use Lone Wolf stocks on all my customs. You can get them just about any configuration and color. http://www.lonewolfriflestocks.com/
Scopes, Nightforce first choice, IOR second, Leupold third
Depending on the scope, 20-30MOA picatinny base.
This would make a very nice elk rig.