Hey T.P. check your private messages.
As to the question, I would vote for one. If you are in an accident, chances of rolling over are proably not that great (assuming your not racing or otherwise driving like an idiot-which you hopefully wouldn't do with a passenger anyway). Therefore, in the run of the mill accident, one or two rollbars probably won't make that much difference.
And who is to say that having a roll bar is necessarily safer than not having one. As a recent example, look at the guy that was killed in Iowa- he only had a driver's side roll bar and he was killed, but his passenger (no rollbar) survived the accident.
