I have a pair of the Turtle Beach XP400s, I received them a little over a week ago for a present but I don't play online enough to benefit from them. It's opened but everything looks brand new.
These have always been the best simple headsets for both 360 use and cell phone use. I have 3 pairs, all of which have worked perfectly for years with extensive use and "how does this sound now?" testing on various family/friends.
All 3 that I've bought have been the black & green. There's no way to choose nor do I even know if the white exists, but for the price and quality it shouldn't matter.