I don't post much, but I lurk often. As you might have gathered from my screen name, I've owned a 2004 A6 2.7T S-line for 6 wonderful years, but it just felt like time to replace it.
Though I did consider an RS 6, in the end I bought this instead:
Selected Details:
2011 S4 Prestige
Quartz Gray with Black leather/Alcantara
Audi Drive Select
S-Tronic (DSG)
Stasis ECU tune (400+hp)
Stasis Touring Suspension (1" drop in ride height, bigger rear anti-roll bar, stiffer bushings)
It's a dream to drive, and I dare say would at least run neck and neck with an RS 6 in a straight line. In corners, there'd be no contest. The smaller size, better weight distribution and Sport rear differential on the S4 would see to that.
So, though not an RS, it's pretty da*n close, and I couldn't be happier.
Happy motoring!