Carbon fiber vs fiberglass aftermarket stock.

[pharmfisher]

I have a left hand Browning x bolt with a wood stock that I am thinking about changing to an aftermarket stock. It seems as though my options are limited given it's a Browning and left handed. I like the looks of the McMillan game warden 2.0, but the fiberglass version is over $700, I don't even want to know what the carbon version would cost. My question is if the fiberglass option would be a good idea? Is weight the main disadvantage? Does anyone have any reviews on this particular stock?