Replying to MCL Knee Brace

Last Easter I completely snapped my mcl skiing. I have been told that this winter I will need to ski with a knee brace, plus I now just can't be bothered being out injured again. I also do a lot of DH mountain biking and so it would be good to be able to use it for that too.
I haven't really got any idea which knee brace to go for though.
So far I have looked at the following:
-Asterisk Cell
-Donjoy ones (there are lots and it gets confusing which would be most appropriate)
-cti braces
Any comments or info would be great.
Cheers