My friend was looking into either buying a STi, a G35 coupe, a 350z or a RX8. Both the RX8, and the 350z were cut off the list (The RX8 just isn't as pretty in person as it is in pictures, and seating in the back is not comfortable, the 350z is only a 2 seater, and though it looks great, it isn't very practical as an everyday ride). We went car shopping (testing) on friday, but didn't get a chance to test drive the STi at the dealership since they didn't have a demo model on their lot but we did get a chance to take a look at the one in the dealership. The interior isn't terrible, but it's far from the near 9 point rating you gave it. seats are wonderful, seating in the rear is almost 'adequate', but other then that it really does feel like it has a chevy interior (sorry RC). The outside however, is much better looking than you'd expect (from looking at the pictures).
I know the g35 isn't on your list but it might be something you wanna think about. The retail price of the 6 speed coupe is almost the same as the STi, so it should still be in your price range. Interior is great (lots of leather, nice seats with good lateral support, great sound system and a navi system if you want it. In the rear the headroom isn't fantastic, but it has decent leg room. The reason it might be of interest is because it shares the same engine/transmission/drivetrain as the 350z, and they both are on similar platforms. It handles and stops as well as a 350z, and that's not an exaggeration. And most importantly it's fun to drive (at least when i gave it a spin). When compared to a STi (just by the numbers), it's a bit slower, just like the 350z but it really is a few classes above it in interior comfort. If you're planning on buying a car you wanna use everyday for a few years this might be something else you wanna look into. I really fell in love with it after riding in it.
g35 info 1
g35 info 2