So I installed a new head unit so that I could listen to my iPhone and have Bluetooth connectivity. I did lots of research and finally decided on the Pioneer DEH 6100BT. The sound is much nicer than the stock radio with no other changes at all. Having said that, here after a few weeks of living with it, are my pros and cons as I see them in respect to the Crossfire:

Pros:
Much Better Sound Quality than stock radio
Bluetooth Connectivity (including stereo BlueTooth - yay iPhone 3.0!)
Piano Black bits look nice
Silver bits look nice
Not cluttered with buttons
iPod interface better than others that I experimented with (Alpine, Sony, Kenwood)
3.5mm and USB connections

Cons:
Blue lights
Controls take a bit of learning (have to actually READ the directions... yech)
Some controls that SHOULD be immediately obvious are not... though it happens that those that are not are the ones that I don't care about (like radio presets), so it's okay... but for some people the controls may be a deal killer... look at it carefully before you buy it
Be nice if there was a USB connection on the back as well as the one in front

Overall, I'm very happy with it. Anyway, if anyone's considering, I hope that helps.