BMW's M3 really is a phenominal car; quick, solid and good looking, but how many do you see around. The S4 is understated and, for an estate, very attractive. Straight line the BMW will win, driving entertainment and again the M3 pips the Audi to the post but for sheer aural entertainment nothing can beat a V8 (except a V10). Not only that, but Audi's Quattro system means that 344PS is avaiable come rain or shine an awesomely inspiring piece of German engineering - next time Audi, a little rear bias on the Quattro and that sacrifice in grip will be more than made up for in driving entertainment.
