I still am on my dealers M3 list but did put $500 down
on a C63 last month. The performance pack on the C63 sounds great.
"The PP option includes a higher-set speed restrictor, up from 155mph to 174mph. PP cars also get stiffer, lowered suspension, thicker anti-roll bars and a limited slip differential"
I'm thinking with a minimum of 370lb ft available from 2,000rpm all the way through to 6,250rpm, BMW's M3 division may be concerned.