The Clarion supports at least a 8GB SDHC card from what I've been reading. The other killer application is the A2DP bluetooth audio which is built in beside normal bluetooth. If you have a bluetooth enabled laptop or one of the new Samsung A2DP enabled players on Amazon:
http://www.amazon.com/Samsung-Portab...dp/B000VQ7ZK6/
You can stream music to the receiver wirelessly. That's why I don't like the Blaupunkt, it doesn't have that capability.
The Clarion was in stock late last week @ crutchfield and went out of stock quickly.