Congrats psteng--I am looking at getting the exact same car with the same options!! The TSX really looks sharp with the black exterior, but I'd probably get the charcoal or silver just because black is a pain to keep clean. Still, 6-speed is a must and I'd really like to have the nav.
I've also been looking at the TL, IS300 / IS250, G35, 325i, Altima SE-R, Legacy GT, and Jetta TDI (44-54 mpg!!) but the TSX (despite being one of the weakest in terms of performance) keeps coming out on or near the top of the list. It may be "overpriced" in terms of straight-line acceleration, but the TSX is very capable in the twisties and comes so loaded that the ONLY option available on the car is navigation. Much like Infiniti, everything else is standard.
Like you, good gas mileage is near the top of my list of requirements. But I like to go fast and it will be tough going from a 350+ HP car to a 200 HP car...I'm just hoping if I decide on the TSX that it'll have enough toys onboard to keep me happy. If I just can't get over it though, the G35 has 298 HP and power all over the tach...but I certainly won't be able to expect to achieve the TSX's gas mileage.
Again, congrats!!