if you are looking for a new car may i suggest a TL? 4 door midsize is more family oriented, they are very quick and agile (faster than the GSR, handling wise on par with it) the engine doesnt rev high but the V6 is slightly more grown up.

as for security, the best thing to do is park the car in somehow. if they have to move another car or take 10 minutes trying to get out of the space it's most likely they'll just keep going instead of steal your stuff.