I've been a Pioneer Premiere user for a long time.. finally decided to ditch it and go with a Alpine CDE-136BT to match better with my 4ch amp. it worked.. sound is so much better than my 10 yr old Pioneer HU. the features of these HU's are impressive.. I like Bluetooth, as well as the USB input for my iPhone.
so far so good.. and it makes my Polk DX speakers sound a lot better too
not a very good pic.. but you've all seen a head unit before.. lol