I'd easily drop $3-4k for a good CNG kit for my eclipse that would let me keep my turbo and all that.

Half the metro bus system out here in Los Angeles is converted to CNG, as well as a good percentage of the taxis and commuter vans. There are lots of new hondas and toyotas running CNG as well. So obviously, CNG is very easy to get here- there's refuelling stations just about everywhere.

The best part- you can drive in the carpool lane by YOURSELF. You'd have to live in LA to appreciate this I think. I've been carpooling with 3 old ladies for the last year and a half (who gasp and scream if I shift at anything over 3k or run a YELLOW light) and it'd be worth a LOT to get rid of them and still be able to get home in under two hours.