Congrats on the car. Don't know about the first thing, but about the Nav: Are you talking about the actual TSX Nav? If so, I'm surprised it's being sold on eBay, or anywhere, because from anything we've seen, it's totally prohibitive to put it in. People have asked about it many times, and AFAIK nobody yet has done it, because the installation would be extremely expensive and hard as hell, if at all possible. Figure like $4000 or more.
If you're talking about some other kind of GPS thing to put in the car, I understand there are different kinds, and some people like them, but of course those things aren't like having the OEM Nav.
If you're talking about some other kind of GPS thing to put in the car, I understand there are different kinds, and some people like them, but of course those things aren't like having the OEM Nav.