Yeah, I find it hard to resist the temptation to put an all black wheel on an all black car. Good thing I've done it, and gotten it out of my system.
The wheels look great on the table, but I'm not happy with them with a tire on them, and on the car. You end up losing a lot of the wheel depth, and everything starts to look too blacked out and the design of the wheel goes away.
It really is a sinister look though!