I have the Dakine ones that i wear under my gloves, they seem to fit well with almost any glove ive worn.
Ive taken some hard falls on my wrist, and have had broken wrist in the past and no issues.
My gf is learning this year and its the first thing i made her buy, them and a helment... but she blew her knee out instead getting off the lift... LOL.
I think wrist gaurds are a good idea.
I wear the Dakine ones as well. They fit well, have top and bottom support. Easily fit under my burton gloves.