I have the ugly SS pipe that comes straight out the back and the fit and look is just fine, bit of a sleeper. You just want to avoid the tip they have that stays turned under the car or you'll get some annoying resonance off the trunk floor. I just always thought it's cool to have a true 2.5" pipe at the outlet which is identical to the whole system. Basically saying, you see that pipe? That's my exhaust!
Unless you get a tip that's designed to come through a cutout in the valance, most will look a little heavy on the hardware.
i agree with above. most tips look half done if not into the valance.
i decided to not spend the hundred bucks or so for doing all that for the tip and polished mine with 400, 600, 1000, 1500, 2000 and metal polish. it's winter, i have no picture, but it polishes up damn nice. try it, for about 15 in supplies you can get a decent sheen.