I just installed the pioneer avic n1 in my 2006 pt cruiser.It plays dvds and has touch screen navigation.I am not sure what you are willing to spend but you can get a factory reconditioned 1 for about $1,000.The sony xav-a1 seems nice also.They sell on ebay for around $800.If you are just looking for an am/fm radio with a monitor the sony xav-7w has great picture quality and it is easy to use.They sell on ebay between 399 to 500.I owned the sony xav 7w and i have the pioneer avic n1 now so if you had questions about either of them you can email me at
wb605@msn.com and i will gladly help if i can.