To answer the questions in order,

1) If I decide to get new tires, which I fully expect I will at some point, I am thinking of the Michelin Harmony tires since Consumer Reports rates them well and declares their rolling resistance "excellent" but they don't sacrifice grip or noise much.

2) I got what I consider a great deal. I paid MSRP with no accessories and the only fee they charged was $45 paperwork which I had no problem paying. They gave me $3200 for my Jetta which had 97000 miles and numerous small dents and chipped paint, and even a couple of dents on the inside (idiot passenger threw a temper tantrum and kicked around a bit :/). It ran well but looked like crap. Oh, and it had been keyed once. All in all, with tax, title, and trade-in, the total that I paid the dealer was less than $21200 (no financing, thank you parents). Oh, and the Jetta is simply where I parked it; the dealer moved it later, but they'll be sending it to a wholesaler; they won't sell it themselves.

3) I haven't noticed visibility out the rear windows but I did notice the side-view mirrors are excellent. My Jetta had crappy mirrors that always had a huge blind spot regardless of how they were positioned... these ones are much nicer. EDIT: Oh, did you mean the rear windshield as opposed to the rear side windows? Well, yeah, the headrests are visible in the rear-view mirror but I don't find them annoying in the least. But if you removed them from your current car then I'm sure you'd remove them from this car because they technically block a part of the view.

4) No nav. It's useful, and I could afford the $1500, but I simply like the regular dashboard better than the nav. With the nav, you have to use small identical-looking context-sensitive buttons and read the LCD to do things with the radio, whereas there are nicely laid-out radio buttons in cars without the nav, and they look alot better at night (simple teal backlighting) than a lit LCD screen would, in my opinion. I don't expect many others to feel the same way I do about this.

Thanks for your feedback; I'm loving the car and the color. I was originally strongly considering having it repainted since I assumed I'd be settling for an ugly color but I think it looks great. I did order seat covers a while ago and they arrived several weeks before the car did, so I'll take pictures on the weekend with the seat covers installed.