Well I have just received my car back from Pulse Audio (Hadleigh, Essex) and they have upgraded the speakers in the front with MTX Audio, rears with Alpine axial's, Alpine booster Amp with separate alpine sub with its own amp and everywhere dynamatted and sound proofed/deadened (is that right word?). and it sounds amazing, I didnt want to lose the blue and me at the moment so I left the HU and I was so worried that just making these changes was not going to make a difference buy how wrong I was. I recommend anyone who listens a lot to their car stereo should at least upgrade the speakers and get the door sound proofed it makes so much difference, dont get me wrong I will be paying for this all for the next millennia but even my wife was pleased and said she could hear the difference while listening to the Archers. The Fiat HU is not that bad but the speakers are pants, I am so glad I didnt/was allowed to choose the Interscope option by Fiat.