I'd recommend Ke Nalu, Quick Blade or Kiaola..
Ke Nalu because everyone around here seems to like them..
Or Quick Blade because the most of the big race winners seem to like them..
Or Kialoa because I like them the most.. and they've been making paddles the longest..
IMO you can get away with one good paddle for both racing and surfing.
It may be a little short for a long distance race.. and maybe a little long for serious surfing.. but it is doable.. and I have friends that do it..
btw.. I'm using a race paddle in the surf.. The Kialoa Hulu Sm..