I am also looking to upgrade up Mark Levnison system. I have a 2001 lx470 and a mid speaker is blown and the bass has stopped working. Additionally, the radio antennae has stopped going up and down. Lastly, the head-unit itself is giving me problems cd's skip, the radio skips, and when you turn on the radio sometimes the volume goes out of control gets piercing loud. I am looking to upgrade my system to a double din navigation with bluetooth, ipod connection, dvd, etc...the whole works do you guys have any suggestions. Also, i would also like any suggestions regarding good speaker components. Thank you!