Dude. As mentioned before many of us are/were in the same boat you are!
Come on over to the
Weight loss Thread in Training & Nutrition Forum here on BF. Its a great place to get motivated, help others, and learn lots.
Sorry I don't have a bike recommendation for you, but I must say that after looking at the Kona Hoss, I am impressed.
Hope to see you over in the WLC.
Bob