I used Pioneer Premiere
TS-906. I also have a US Acoustics 65x4 USX 4065 amp that is currently putting 65watts to the front speakers and 135watts bridged to a single Apline Type S 8" sub in the rear deck. I let the headunit handle the rear 6x9s.
This is a pic I posted on the old forums for another member a while back. I actually ground out about where I marked in blue, so the speaker bracing could slid in. That will vary depending on the speaker, of course. Most people, however, grind that handle piece away, as marked in green.
Hope this helps!