Originally Posted by bikerlbf406
Sorry to hear about your injury, first of all....
On the rest:
It's good you don't have an aggressive sport bike, for starters. The riding position as well as the stiff ride (in part caused by the aggressive tires suchbikes tend to have) would not do your back any favors. Your Nighthawk has a muchmore forgiving riding position, and its shocks can be set for a pretty soft ride, too. You might look into an aftermarket seat with more cushioning. Corbin makes great stuff.
First,though, I'd ask your doctor for his opinion about riding given your injuries. It may not be a good idea... keep in mind that riding involves moving your body with the bike in a way that driving doesn't. Weight shift, leaning, etc. - I'd seek a medical opinion before getting on the bike, frankly....