If, by "cool-looking" you mean you want to look like a Bond girl, then Bogner's Ski Suit Marly ($2,699; bogner.com) is the one-piece for you. Fully waterproof and breathable, the Marly has all the bells and whistles to keep you warm, but enough bling to get the attention of everyone on the mountain. The suit's back, arms, and chest have flower motifs embroidered with silver thread and Swarovski crystals, and the removable fur-compatible hood (fur sold separately, $279) will surely be a conversation starter on the chairlift.
The North Face's Brightlights ($379; thenorthface.com) one piece, has bells and whistles of a different variety: an upper- and lower-body Recco avalanche reflector, a helmet-compatible hood, and seamed-sealed everything. This fully waterproof, breathable suit, in bright, blocky, green, purple, and yellow, will also turn heads, most likely because you'll be leading the charge to the backcountry after a big snow.