I'm not expert when it comes to audio but I will take a shot since I have messed around with this kind of stuff somewhat. That head unit is a good one and you will most likely notice a difference in sound just because of the preset eq that these types of head units come with. In my opinion speakers would probably be your best bet for a real noticeable difference in sound quality. If your like me though and listen to mostly the radio when driving around then I would say just get the head unit and you will most likely be very happy with that.