After playing around with "quality" aftermarket bulbs, and having problems with em, I decided to bite the bullet and get some Osram Cool Blue Intense (CBI). They work as expected and they better for damn near $200
They are advertised as 5000K or 5500K (cant remember). To me they are Pure White, with no yellow, and a very slight tinge of blue. I do wish they were a little bit more blue, but overall I'm happy with em because they actually work!