As for the brakes, they are:
Stock - grey
M-Sport - blue
M-Performance - choice of red, yellow or orange
M-Sport is a $1500 upgrade I believe. While at the moment I don't think BMW AU have brought the M-Performance brakes over here yet (might be wrong about that!). But they will probably cost an arm and a leg when it arrivs. As for which is better, from my understand on these forums is that M-Sport brake kit is more than enough for your everyday use and with the odd occasion of taking your car to the track. M-Performance just provide less fading and better stopping performance on track when compared against the M-Sport and with the bling factor on the streets.
No I haven't spoke to anyone as everyone as it seems they were busy that day, so I just sat in the vehicle and looked at the prices in the showroom.