Digi-Key - CLM3C-WKW-CWBYA453CT-ND (Manufacturer - CLM3C-WKW-CWBYA453)
A light 5500K would give a nice warm (yellowish) light. I wouldn't suggest anything above 6500K because the ammount of blue tends to glare other drivers vision.
I am about to buy some of the linked LED's or similar because they are pretty efficient, and have a good light quality (little weak in the green) and a high efficiency AC/DC switching power supply to light my computer room.