check out this unit....I have one in my car and it DOES NOT require extra space for the changer...it isnt the fanciest looking unit and doesnt exactly match the crossfire interior but in terms of sound quality and satisfaction...it cant be beat...and did i mention that its a single din unit...make sure you get the unit with green LED lights

here's the link:

http://www.nakamichi.com/auto/musicbank/MB100.HTML

it's a lil pricey but you can find it on Ebay no problem for significantly cheaper than retail...I got it for $599 on Ebay brand new...good luck