I did 3 snowshoe races last winter in NH. For the first one, I used a pair of Axis 930s - quite a bit more snowshoe (size and weight) than I needed for what was mostly on well groomed XC trails. After that I looked at the Atlas Run and Race models, but the Race model seemd rather pricey.
A lot of folks I talked to, including ultra-runner and orienteer Dave Dunham, swear by Dions -
http://www.dionsnowshoes.com/ - they like that they are sold in 3 components: frame, binding, cleat. This allows them to customize for conditions (teflon covered aluminum cleat for wet snow, stainless steel for hard ice), larger frame for training in soft snow, etc. and if something wears out or breaks, you only have to replace that part, not the whole snowshoe.
Red Feather was one of the race sponsors - their race model seemed OK, a bit heavier than the Dions or Atlas.
Ended up getting a pair of TSL 825s
http://www.tsloutdoor.com/www/?country=us&lg=en
relatively inexpensively on sale ($110 I think) at the nearby ski shop.
For racing and training on packed trails, I'm going to stick to the TSLs this years. For training or goofing around in unbroken trails, the Axis 930s, or in really deep snow - my classic 12" x 48" ash and rawhide pickerels with the up swept toe. They might not be fast, but it's a hell of a workout busting through 2' of new powder.
Man, I can't wait for snow to fly...