Do you mind if I ask why a hybrid? I ask because my original plan was to buy a hybrid. I rode a mountain bike on the streets, Trek 3900, but wanted to get something a bit more road worthy. Being 315 I thought a hybrid was they only road style bike that could handle my weight. Then one day I rode one of my brothers road bikes, and I was hooked. I did some research and realized I didn't have to get a hybrid, a road bike could handle me. I found a CAAD8 on sale at my LBS, exactly at your price range, I put 50% down, and a few months later I rode her home. That was last October, and here I am 30lbs lighter, and having a blast.
If you want a hybrid get a hybrid, all I'm trying to say is don't feel your options are limited because of your weight.