One more thing....there is actually an option that kind of gives you the best of both worlds...The Rogers Super Stock. A few years ago Colt was turning out M4s with the Rogers Super Stock as standard equipment. My agency ordered 15 or so M4s around that time and after 5 or 6 years of very hard use by the SWAT team the rifles look like hammered whale dung, but those Rogers Super Stocks still lock up rock solid (read ZERO wiggle) when the friction lever is engaged. It's the only adjustable stock with a friction I have ever used that truly has zero wiggle. Brand new they run $65 or so. I have seen them listed on gun boards for sale as low as $30. The link below has info on it.

Rogers Shooting School - Reactive Shooting Training