I've always liked the performance of synthetic stocks, light and durable, but I recently purchased a stock from accurate inovations. it is free floated and has afull aluminum bedding block to aviod the warping problem. I'm going to give it a try this year and see how it holds up. I was surprised how light the stock was too. I thimk it might be even lighter than the factory synthetic stock. So far I'm pretty impressed with it.
Here it is on my 300 win mag
http://www.accurateinnovations.com/