Hey Cam,
Another vote for Alpine here, but I would probably jump up to the CDA-105. It has an IR sensor on the front of it so you can have remote access from the back of the van. If it won't control the Zune, not all is lost. All you need is a flash jump drive with all your music on it.
And as an added bonus, it is upgradable to the Imprint module that I was gushing about in this thread.

Shawn

Epic 80/600 + M3's + M3 Algonquins + M2 Computer + EP125
I think I'm developing an addiction.