Another poll about colors? Yep. Our own Liam Spradlin mocked up what a white Nexus 5 might look like after some pretty likely bogus images of such a device appeared on the web late last week. Here's a more realistic representation of what each will probably look like.
White phones do tend to get a bit dingy and yellowed / grayed over time, but there's something about the N5 whited-out that really appeals to me.