I have the SLK32 (SRT6) brake swap done on my car and have never had any issues with braking on track or during autoX events, SS lines help with predictability and pedal firmness as well.

There are several SRT guys who have upgraded or even a wrecked setup from MrMopar (our resident parts guy). I waited patiently and got mine for a steal, they are out there. Good luck and have fun at the track

Edit: Since it is a base, brake cooling ducts would be easy, and as Max says, use the fog light cutouts, since the base does not come with fogs. If you end up doing the 32/SRT swap, I highly dought you will need the additional cooling.