[skifreak69]

That is a great deck, with a wicked display. And the Bluetooth function is great, the unit includes the mic and everything needed to set it up for phone use. Now as you didn't mention bluetooth in what you're looking for out of a deck, you should look at the DEHP880PRS, a great sounding deck with lots of adjustments for sound quality. If you like the looks of the 9800BT, also check out the DEHP780MP which is a very similar deck but loses the bluetooth abilities. I also recommend trying to find the Pioneer Premier versions as you can usually grab them for the same price as the Pioneer units, but then get a two year manufacturers warranty, which is a good piece of mind. Also for Ipod connectivity with control and display, you'll need an adapter (CDIB100 I believe) that runs for around $140.
Basically, if you've got a bluetooth enable cell, go for the DEHP9800BT (or Premier DEHP980BT), otherwise go with one of the other two and save some cash. All three have built in auxillary inputs so you can connect your ipod through that ( just a 3.5mm to 3.5mm cable), or go with the adapter and get the control, display, charging abilities.