Prosmatec all the way ! Peace of mind ! If you are buying the car to race, then only go for manual, but if you want to drive the car in the city for day to day use, nothing beats Prosmatec, zindagi ko asan banaye Prosmatec ! Remember traffic jams and the clutch ?
Although i also dont like CNG on these cars, the person i bought my current 7th gen prosmatec from, had installed CNG in it, i run on petrol when roaming around near home or when the trip is short, and on CNG when the trip is longer like above 5-10km... its working fine !
P.S. my previous car (97 civic, 6th gen automatic transmission) was run on CNG from 2005-2011, no issues whatsoever ! CNG was installed when the car had done 40k and i kept the car till 125k, the car was awesome no issues !