depends
It all depends on what you would like to do. Do you already have a precision bench rest rifle in .30 caliber or above?
If yes then I would Go for the SA Loaded M1.308 You will go through alot more ammo if the semi-auto and I'm afraid the days of surplus .308 and 7.62x51mm NATO are long gone. Now if you don't have a .30 caliber bench rest/precision rifle.....then I would definitely go for a bolt action .308.
Here is what I would build with $1,500 dollars.
Remington 700 Police .308: $865 -/+ or Savage 10 Law Enforcement (price depends on model most are around $650-$700)
Rings and bases: $50-$70 get good quality steel ones.
Harris Bipod (or similar brand) $70-$100 depending on model
Scope: Sightron SII, Bushnell 4200, Burris Euro Diamond, Leupold MK2, 3, or 4...etc or SWFA Super Sniper scope...your scope depends on what you will be doing...etc how far you will be shooting....but you can get some good glass under $550...and you will have even more to spend if you get the Savage instead of the Remington.
Good luck and let us know what you get!
Ryan