I have been looking at the pioneer avh 4300 but found a great deal on a sony anv 660bt so I couldn't pass it up. I put it in this morning seems like a nice radio and a great pic. The only thing was it didn't have was the nav module. I called sony and they have it but iys $200 I'm not wanting to spend that much. So if anybody has one or knows where I can find a. Cheaper one please let me know. Thanks.