OnyXterra - My limited understanding is that the HDD does not come out, but I'm not 100% sure either. If that were the case I would have thought the dealer would have mentioned it. Guess more research is in order. Does you're NAV system give you GPS info, lat-long info? I have not been able to find that anywhere. I did ask them about installing an older system but it was only a couple hundered less then the AVN5435 so maybe it's just better to get the new one. I jsut wish the 5495 wasn't SOOO much more then the 5435.

CDDIG - I agree, I have no idea where you would put the other device, one of the things I like about the X is that there is a lot of storage space for all the extra stuff you seem to keep in your car. I don't want to loose any of it. Because of that I'm really trying to find that all in one option.