Whats a better starting motorcycle for a 6'3"235 pound guy?

I just signed up for the motorcycle safety riding course, and as soon as im done with that ill be looking to get a bike. So far i've narrowed it down to 3 bikes.1.Harley XL883 Sportster2.Kawasaki Vulcan 5003.Suzuki Boulevard S50while i know its better to start out with less power as a beginner, im a big guy, so im worried that the japanese bikes wont be able to haul me (and maybe a passenger) around easily. Im a pretty strong guy, so bike weight isnt as big an issue as it may be for smaller riders, but id still like some thoughts on which to get. I've always wanted a harley since i was a kid, but if the other bikes would be able to perform, id like to know. thanks.