The 440i is awesome, one of the lads had a 181 440i with the M Performance exhaust, intercooler and tune. Plus it had a few nice carbon bits.

It was a pretty quick machine and it sounded really nice, better than the M4 in fact. It is nearly as quick as the M3/M4, I drove it along side (literally alongside) an F80 M3 and there wasn't much in it with the M3 being stock and the 440i with the M Performance tune.