You all have asked some good questions.
First of all, although the Bonneville protected my wife well in the accident, she wants to be higher up off the ground. She saw the grill of the Ford F150 heading right toward her window at eye level, which gave her quite a mental shock (but fortunately, not a physical one). She thinks that setting up higher in an SUV will at least put her up on the same level of trucks and SUVs in an accident. That is her line of thinking anyway, and this will be her vehicle.
I know that the GC SRT8 will get bad gas mileage. Most of the ones driven daily are getting about 15 mpg city and highway mixed driving. Gas mileage isn't really a concern. But with the GC'* handling, braking, performance and safety is a good compromise. Plus it has side and head curtain air bags which also help in the safety department.
Most of you probably don't know this, but I came to the Bonneville from an '04 GTO that also was totaled in an accident. I feel GC SRT8 is a great replacement for the Bonneville/GTO plus the extra utilitiy of an SUV.