MPO I think the fabric is really important, get gore-tex if you can. It sounds like with your price range it would be easy for you to afford it. Go the The House Snowboards Snowboard Boots Bindings Clothing
and look at the AK line from Burton. Lots of nice goretex stuff and low prices.
I would say Helly Hanson, but after seeing the range for 2011, I'd hesitate, as they are now concentrating more on ski clothing, & going back to a regular fit, & less of the neon colors.
However, based on what I've been selling in my store, I'd totally check out O'Neill, Bonfire, Nikita, Roxy, DC, Four Square, or Volcom. I'd also allow up to US$500-600, & that'll get you some good outerwear. As for your colors, things don't have to match. Mix up colors, as imo, I'm so over woman trying match everything, from the board, all the way up to the beanies/toques, inc base layers.
Things to look for are cargo pockets, pit/leg venting, goggle & mp3 player pockets, hand warmers, leg gussets, & a decent waterproof & breathability rating...