It is best to consult a qualified dress designer, rather than spoiling your look and image by buying one off the rack. Colours like burnt orange, old burnt gold, blue, brown and lemon yellows are in demand. If you do not like them or do not like to be too flamboyant choose white or black shades these never go out of fashion. Plain chiffon and silk are the in-thing for sarees. For salwars plain parallels with slits, and short knee length light tops are in fashion.
Traditional patterns are very much in demand.
Follow the above regimen, and you will be sure to dazzle your friends and family this puja.