It sucks that you cannot demo a racquet. I'd never buy one without trying one out first. You know that TW has a Demo Program, right?
Anyway, I'm on the smaller head size camp. I think most people can pretty easily adjust to 95 sq. in. racquets or smaller. But ultimately, it's up to you and how the racquet feels in your hand. Which is why I highly recommend demoing a racquet first.