Caliber choice.... 7mm with 160's or 175's at 3,000 -3,100 fps or .308 dia with 180's or 200's in the 2,900-3,100 fps range
The customs would be either Jarrett or NULA $3500- $7000
The factory would be Remington, synthetic stock and a 24" bbl with a Timney triger and pillar bedding $2000
If you go smaller dia, would the 6.5's hold up to elk bones ? Also if you drive them above 3,300 fps will they hold up at 25 yards if that is your opportunity ?