Welcome to the sport! You're 6ft and 240lbs...welcome to what's known as the "clydesdale class"....

It's hard to find a really solid bike for your size for your budget. You certainly can't deny Sebring's recommendation though. Your biggest concern as pointed out will definitely be the wheels. The Rhino Lites are very sturdy and rather inexpensive options for you.

I also look at some of the Giant models in your price range. They've got fantastic warranties and service if you happen to break the frame.