Dome light that is
I just got my leds in from superbrightleds.com to convert mine from incandescent to LED. I went with the replacement bulb route since I didn't really feel like taking my dome light apart and hacking it up. I have the map light version so I would have been hard to go the LED array route anyways.
For the maps I used 2xWLED-WHP9-T
194 type plugins
Then for the center light i used a 4210-xWHP12
festoon type plugin.
It doesn't seem to be much brighter(but of course haven't seen it at night yet). At least it accomplishes not having to worry about killing my battery if I leave my doors open for a long period of time which is one of the reasons for the conversion.