Considered the S4 before finding my 1M. When I test drove it I just wasn't all that impressed, and I was totally disgusted with the treatment I received at the local dealership. I love the way they look. Granted I was comparing it to an M3 cometition with dct, so not really a fair fight.
My brother bought a TTRS, thing is a beast. Audi is kicking ass right now.