I have the Clarion VZ400A, which is the single DIN version of last year's model, and it's really quite good.
There are two issues with it that I haven't been able to resolve with Clarion though:
If an iPod is connected to the USB input, I can't select AV-IN (my HDTV tuner)
If I try to play a video on the iPod it plays the audio from the iPod video, and the video from AV-IN
Other than that, which I'm hoping to resolve soon, it's a great unit. In terms of looks, it doesn't stand out at all, and it does everything fine. Bought it from Autobarn, although their after sales support is terrible if you don't get them to install it. Was also cheap, and sounds pretty good.