What HD tuner should I buy?

I'm about to buy a Kenwood MP-635 radio for its HD and ipod video (I think it's compatible with the radio) compatibility and I want to get the HD tuner. I saw Kenwood's model, the KTC-HR100TR for $142.
http://www.sonicelectronix.com/item_...C-HR100TR.html

Combined with the radio itself, which is about $169 and the hd tuner $142, that's going to be over $311. I kind of want to keep it a tad cheaper than that while not sacrificing sound quality. Since I'm not upgrading my four speakers in my car or installing an amplifier, I think I should be able to find something a little better.

One idea is to get the Kenwood KDC-MP535U. It doesn't have the fancy graphical effects like the MP-635, but it still has the features that matter like HD-radio and ipod video connectibility. Buy the
Kenwood KCA-iP500 http://www.sonicelectronix.com/item_...CA-iP500.html# and whatever is recommended in the HD tuner department.

Interesting it already has an HD tuner installed. My only complaints about that model is that I can't find an adapter for the ipod. The Kenwood model I was interested in comes with a $20 dollar adapter for usb, audio jack, and ipod connection capabilities.

Part of me wonders if the HD functions would even be worth it because I am primarily doing this for my ipod. I guess I could always buy the hd portion later.

The adapter that comes with the Kenwood KDC-MP635 has a $20 aux, ipod, and usb adapter combo. The benefit of using the ipod adapter is that you can see what song is playing right on the radio instead of having to mess with the ipod itself. You can even control the ipod through the radios remote.