Highpowershooter has it right. 2 CMP service grades cost the same as 1 SA Inc. The "new" SA Inc ones I've seen at gunshows have been on Lithgow receivers, which I've heard very bad things about. I heard that some of the SA Inc "new" Garands were built on Berreta receivers, I haven't seen any. One CMP Garand lovingly restored by Deans Gun Restoration or Orion would cost about the same as one "new" SA Inc Garand.
We don't have much choice when it comes to M14 type rifles, since the BATF in its infinite wisdom (not!) has applied the OAMGAMG Rule to the M14 so we can't get the real deal from CMP. As a result, SA Inc is pretty much the only game in town if you want a complete M14 type rifle and don't have the time or skill to build one up or have the bucks to have a competant smith build one up. Luckily, we have the CMP for our beloved Garands.