For North America, Denso seems to be building all of the current Toyota Nav units, so the operation/functionality is going to be pretty close to the same no matter which unit you get. I don't see an advantage to going with a different model, except it will be hard to install because of the face plate.

There are these units:
http://cgi.ebay.com/ebaymotors/2007-...spagenameZWDVW

(...you might have to sign into eBay to see these.) These are built by a third party, but have never seen one actually running. Not sure if they are better or worse.

What don't you like about the factory unit? I have a lot of units, the Denso one is not bad.

Later!

Dang