You wear what you wanna wear....plus the skiing vs snowboarding thing is becoming less an issue with each passing season....for cheap outerwear I'd say quicksilver shells and then wear fleece under them....or you can find a bunch of smaller snowboard outerwear brands cheap too....check out evos outlet...you should be able to somethin decent....the reason I suggested quicksilver though is it's a bigger company so ya can probably find previous years cheap but it's still gonna be decent quality cause it's a bigger company ya know?
I'm a fan of grenade, I've had grenade gloves, pants, and coats for 3 years now and no one has said anything. Some boarders even complement it so i dont think it matters, if skiers wear it.
Until this year, buying armada, I always rode a mixture of snowboard and tech stuff. I had a burton ak jacket, volcom pants, h/h and marmot stuff as well.