The Ace and VLTOR are both nice...I've got the VLTOR club foot A1 length, it's perfect in terms of length, and with the club foot, I can actually shoot from the bench with no problem.
The ACE is more of a pain if you're bench shooting, but it too is a very sturdy, well made stock.
I've got an LE (stubby) stock, and have to agree with most people that you need the spacer to get much use out of them (unless you're always wearing body armor).
I've also got the post ban CAR stock on my lightweight...I certainly don't feel it's as bad as some folks think, at least from the comfort standpoint.
I will, at some point, check out one of the ACE tube stocks for the lightweight rifle...I think I ready it weighs 5 oz...basically, it's just a foam tube for over the receiver extension, and a piece that comes down from the end of the extension that goes against your shoulder.
Too bad they want $90 for it...they must me using a VERY expensive foam piece [:D]