Close to buying a new tl.  One question I have is the nav system. I
have never had one, or even been in a car with a nav system.
        What I want to know, is the following.

1)  What are the advantages and disadvantages if any, of having the nav
system in the tl,  besides the obvious of its intended purpose. I see that
having the nav system enables other things, but I am not sure.

2)  Is a nav system, really usefull for its intended purpose? How difficult
is it to use? In other words, in real life, and not for show, is the nav a
usefull, used device?

3)  I see the dealers near me, are hardly discounting a tl with nav, but the
ones without are discounted, why is that?

4) Does the nav system, help the resale value , say three years down the
road?

5) O>T.   Is the stretching and splitting of the seat leather a real bad
problem, that I am going to encounter?

6)  I have been deciding between an infinit g35 awd as opposed to the
acura. The infiniti, definately has a better more controlled ride and a more
aggressive engine, but the acura, beats it out everywhere else.  Going from
a awd to a front wheel drive, am I giving up a lot?
       I live in a big city and will be using it to commute from a suburb
into the city everyday. We can have a fairly harsh winter, and rain. Should
that be a deciding factor.

                  Thanks a lot