Greetings, I'm currently waiting (for the second time) for a Civic Hybrid. I have two questions. 1) How can I find information about the Navigation system it includes and how does it compare to, say, the Pioneer AVIC-Z1 (which I have my eye on). Does it integrate well with the Civic environmental controls and so on that the factory NAVI features? Would the installers screw up the electrical system likely? I spoke with a Honda tech and he said it won't necessarily void the warranty but if there is an electrical problem on a wire that leads to the 3rd party NAV then they might not honor the fix under warranty (or even do anything about it if I paid them to, for that matter). 2) I am interested in having a sunroof installed. I can't live without it in my Tacoma. The salesman said it wouldn't effect mileage noticably. I'm wondering how it might effect the balance and such regarding safety and airbags and aerodynamics and so on. Anyone here have any information? Thanks, Shawn