Crossmax is brand new for 2011, I've only tried it on in the store. Feels similar to the Wings in my opinion, but doesn't seem to role onto the toe quite as well as the Wings. It claims to weigh about the same as the S-Lab but in the store the front half felt a bit stiffer than my S-Labs. Stiffness was more similar to the heavier Wings. Have not tried them on the trail though.
Speedcross is a shoe many like for racing but does not fit my style of movement.
Salomon S-Lab 3
I own several models of shoes but the S-Lab is my main shoe. I have at least 2000 miles in it. I use it for running ultras (50 & 100 milers). also use to train. I have taken them on a couple fastpacking trips in the Sierra also. I like the S-Lab a lot. I generally get around 500 miles per pair. I am on my 5th pair.
My size 9.5 weighs 635grams for the pair (11.2 oz per shoe)
The S-lab is simply an ultra light version of the Salomon Wings. You need to like the Wings in order to like the S-Lab. It is a very supportive shoe with a beafy heal (for heal strikers) and a strong medial post for alignment. The cushion under the ball of the foot is a bit less on the S-Lab than on the wings. It does not seem to have a rock plate up front. You Will feel the trail in the front part of the shoe. But I actually like this. The built in scree gator under the laces keeps small rocks out very well. This is not a "flat" shoe like the new wave of minimalist shoes. It has a 25mm to 13mm heal to toe drop..
This is a pretty expensive shoe. $160 at full price.
Current model is the S-Lab 3
they are coming out with the S-Lab 4 this spring (May I think).
you may be able to find S-Lab 3 on sale soon, and after the S-Lab 4 release.