... yeah... but some people, like even you, want to go even faster or at least have the ability to.

I'd suggest going with a tune (find a good dealer that'll work with you warranty wise) and axle-back exhaust for the fun, really, noticeable part.
With those two things, in just a street car, you'll possibly be happy.

Until I start tracking mine, strip, road course, autoX, a tune would be all I'd do. Then again, my exhaust is already loud. lol
Since I have yet to find a good dealer (in any category) I'll wait on the tune.

As stated above from "FromZto5", it really is a fast car stock. When the air gets a little more dense, it get's even faster and louder!

 

Well I guess that means I've been living under a rock... I didn't see your thread. My bad

 

I'm running the Ford Racing Performance download in the computer (did it myself) GT 500 over axle pipes (because they don't have resonators) and the GT500 axle back mufflers. The car sounds great. Respectable muscle car sound at idle, and loud but not obnoxious under power. Other tunes may be worth more h.p. but that does not matter to me. The car will get sideways with traction control turned off, and my dealer gives me no grief about a Ford Racing download. I have to pass emissions here, so the cats are on the car, and the FRPP download is 50 state emission legal.

 

I don't think I made a thread. :-P

 

EXACTLY on these points. A full quality exhaust system, from the headers back with a tune will be a great idea along with a 93 octane fuel tune, if you have that in your area would be a great start.
And yes, the cool dense air is great for these engines and it does get louder.