The Otereo Super is often suggested as the full-suspension bike to get if you absolutely, positively have to buy a full suspension for under $1k, but a lot of people would still say to avoid it. The Otero Comp is $200 less, so I imagine you would be making some pretty big sacrifices in quality.
If your main use is on the road, you don't need full suspension. At 300 lbs. you're going to max out the suspension travel anyway. There are plenty of hardtail MTB's and road bikes that would be suitable for you. I weigh 40 lbs. more than you and I am on a bike with the factory 700c wheels, I haven't broken 'em yet...