I'm looking to replace my stock JBL 6 disc HU. I swapped it out once before with a pioneer touch screen (can't remember the model but a picture is posted below) but the sound quality didn't seem all the great. Like, there was not as much bass to the music as with the stock unit and I don't mean bass as in loud trunk rattling bass, just enough for rock music. I basically had to turn the bass all the way up on the pioneer unit to match the level 3 setting on the stock unit. Anyone else have this problem with their HU's? I'm looking for another touch screen, preferably one where I can connect my ipod in the back or a usb port for a flash drive in the front. And in case you're wondering, my pioneer unit was stolen, that is why I'm looking for recommendations. Thanks.