i dont know about the mp3 capabilities really but i am quite certain it will at least outlast(if not be much better quality) than the jvc and sonys. it somewhat depends on your stock system how much better the quality will be. i put a kenwood in my car and noticed a bit of a difference(positive) but thats starting to shit the bed so i'm looking into a 7600.
just dont totally cheap out on stuff, it'll end up costing more in the end.
just dont totally cheap out on stuff, it'll end up costing more in the end.