Get the resonated Miltek especially if you do the downpipes. Not too loud except when you're "on it". Non- res is plain obnoxious in my opinion.Skip the valves that open with sport button.

 

At $730 its less than half the price of the milltek or gmg and sounds great. No resonators but comes with an xpipe to reduce resonance. The only thing i dont love it the quad tips but they are beutifully made and double walled.

Here's a crappy vid of mine.... search youtube for others....

http://www.youtube.com/watch?v=Ddrq93ET9jk

 

Nice looking RS4. Love the stance.

 

I love RS4

 

Hey DesertCaymanS my RS4 has the downpipes and the non-resonated Milltek exhaust. I love the exhaust note and I get many compliments.
Most can't believe the exhaust sound is coming from the car. We are all different and different tastes and opinions but I love the shear grunt it produces. On the downshifts and the heel & toe blip of the throttle the sound is music. Loud and authoritative.
It kind of reminds me of American V8 muscle.

Cheers,
GT3Ranger

 

very very nice...man the RS4 is quickly becoming a front runner for next car purchase

 

Hey, i'd love to see a movie of your RS4!!