Hey Steve,
I just picked up my HG last month, so I have not got to shoot it yet. BUT......I have been researching them since I started shooting. From what I have gathered, laminate is the way to go. It has something to do with dampning the various vibrations. My secon choice would be fiberglass (McMillan).
Like I said, I am going off of what info I have gathered by talking to shooters and reading on the net, not by actual experiance....take it for what it is worth.
Good luck, and see ya next summer....or maybe at one of the "tactcal" matches in Princton this winter.
Good luck,
Tod