For bulbs, I suggest hella bulbs. With respect to speakers I had 6.25 inch infinity reference component speakers on front doors and 5.25 jbl component speakers on my rear doors. However, I have added jbl 4 ch. amp to drive these speakers. At the time of upgrade I don't know that with space rings rear doors can take 6.25 inch speakers, otherwise I would have gone for the same set of reference speakers which are in the front doors, in the rear doors also. Even with amp. I don't loose the blue and me only thing I lost was whenever the ignition is off I cant play radio/cd. If you want to play music even when ignition is off you can add a switch to on/off the amp, but, every time you have to turn it off whenever, the ignition is turned off. If, you forget to do so, battery will be drained and you won't be able to start the car. I strictly advise you to add an amp to have the full juice out of your upgraded speakers, the stock head unit can't do the justice to the upgraded speakers. Else, before going for upgrade do an audition of the speakers with amp and without amp. you will clearly, know the difference.