Yeah that's what I meant. Any headunit you use will be fine with the rest of the Mach audio system. Some people do experience audio troubles, but as long as you're not blasting stock speakers and they are working to begin with you should be okay.
The kit should be something like Metra Part# 99-5520. You can go to Metra Electronics
and check the correct part number for your car. I forget the exact part number off the top of my head.