The thing about white/black/grey is that it works with every colour scheme in WP8. Red, Cyan and Yellow have certain limitations as to what looks good as a theme.
Thats just how colours work.
Personally I wouldnt want a black Lumia 920, as Ive had 2395073249852752 black phones over the years. I chose a white one, which I find very stylish with the dark graphite buttons and the dark bezel, jackplug and microusb. Works very well with both black/white backgrounds and any theme colour. Thats my personal preference though.
HOWEVER, to get to the point: keeping my dislike of black phones in mind, Id rather have a matte black Lumia 920 than ANY HTC 8x, simply because I think the 8x is a VASTLY inferior phone and looks insanely horrible designwise. For all the reasons mentioned above; Nokia Music, the camera, the wireless charging, the build quality, the sunlight filter, the glove-use, Nokia PhotoBeamer (dude its amazingly awesome, google it) and the fact that Nokia updates things while HTC has a bad trackrecord of it, especially on their WP devices.
TL;DR: Really? Read it, its not that long.