Only 500 miles a year? You will not fully experience the joys of an SRT-6. You may want to check out the Northwest Crossfire Club (NWCC) as they have frequent group events in your area.

I do not know if your SRT-6 is modified or not, but you can gain about 50-60 HP by doing the following:
1) Install a dual cold air intake from Needswings (Performance auto parts & aftermarket auto accessories for your car, specializing SRT4, Crossfire SRT6, SLK32, C32 AMG, VR-4)
2) Get a 62mm supercharger pulley from Rudy (rcompart)
3) Get an ECU tune from Eurocharged

These mods will put the extra "permagrin" on your face.