Auto accident settlement (advice needed please)

On Christmas eve (12/24/11) I was in an accident with my girlfriend, we were t boned by a driver that ran a red light, we were hit on the right side of the car (I was the passenger) and I suffered a fractured arm (shattered in like 5 places, humerus fracture to be exact), and a laceration on my ear (I banged my head against something, can't remember what, but had to have my ear glued back together), anyway the doctors said I needed surgery for my arm to ever have a chance to fully recover, so about about a month later I went in, and had a plate and 10 screws put in my arm. So finally the other driver's insurance is accepting liability and paying the med bills and settling.

So my question is, what would be a reasonable amount to settle for (for pain and suffering?)

http://tinypic.com/r/t86cld/5