One of my cousins insists on buying me a brand new 08/09 Armada's El Rey (they're cheap, otherwise he wouldnt buy them for me). After arguing a lot i finally agreed but idk which length should i get. Im 6' 1/2'' and 185lbs. I spend 50% of the time in park, 30% groomers and 20% pow. So should i get the 178 or the 185?? im supposing the 185 should do best, but i want some advice.