Im using a Clarion APX490M, and it works flawlessly. I just purchased a second amp to power just two new Polk subs i bought. I need to build a sealed box for them, so it will be a little while before i get them installed. Its tricky trying to get the subs to fit in a spot and make a box that will work.
I am prolly going to replace the Sony with the newer version that has the sub preouts too, its the CDX-MU60UI. The wireless remote is useless unless you have direct view to the radio, the remote radio controller by my driverside is really nice though.