It looks like I'll be inheriting my dad's 2003 ES300. The car has the 6 cd changer, but not the Mark Levinson system. I'm really interested in having a head unit with aux in and a usb slot, but thus far my search has turned up no easy way to make this happen. For the time being, I would settle for some kind of auxiliary or rca hookup to the stock amp. Are there extra rca jacks on the stock system that I could plug an mp3 player into? Next, I'm wondering how much I'd need to spend on a new amp and speakers to significantly upgrade the sound from the factory system. For $300-400 would I see an improvement? Any and all help is appreciated! Thanks!
Also, the cd changer will play burned CD-Rs, I hope?
On second thought, I'd probably be content simply adding a line-in somehow to the stock system, so I could plug my mp3 player directly into the amp. I really don't want to go the FM transmitter route, as it degrades the sound quality too much for my liking. Anyone know if this is not too difficult?