I just got an Alpine deck installed with the ipod kit and it freakin rocks! I didnt change out the stock infinity speakers because i thought they sounded pretty good and they're still running off of the stock amp. I also added a 12 inch sub and an amp that I put in myself and the system is just awesome. By the way, running wires to the back of the car was so easy it wasn't even funny. Only problem now is a faint rattle in the trunk that I have to cure.

If your speakers are fuzzy or nasty sounding they could be getting ready to go or they're just blown. I would recommend getting a decently priced deck if you want to get a sub and amp. A note: if you get a sub box make sure it fits in the trunk.. I bought one and the trunk is not very deep in the 2g's and it didn't fit so I had to get another one. I have a pretty nice panasonic deck that I used for like 2 months and then I wanted the ipod kit so I had to get the alpine deck. If you want it I could cut you a good deal. Its got the connection for the cd changer and sirius radio too. Plays mp3's and blah blah. It's only a year old so. If you dont want to go the sub route you could just replace your speakers with some really nice onces and it should give you a fuller sound. I'm not an expert or anything but I thought I'd put in my two cents. I've installed a few systems here and there.