This is a great all-around car with few compromises. I traded a 2003 M3 for my S4. I love the S4s V8 rumble, MUCH better than the M3's metallic howl at higher rpm. The S4 is a technology showcase (w/ NAV.sys) vs the basic M3. The M3 wins by the numbers (0-60, slalom times, etc), but the Audi is easier to live with and more luxury. The AWD S4 pulls effortless out of a corner; the stability system remains invisible unless real trouble is at hand.
V8 sound. Precise, short-throw shifter. Quattro AWD with stablity control: makes mindless acceleration easy and risk-free (the understeer is quite predictable).
Needs to shave about 200 pounds to be more competetive. Fuel economy needs improvement. Clutch should be more linear and less abrupt... makes driving smoothly very difficult. More (sporty) exterior details to distinguish the car from an A4.
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