Basically the two choices (944 vs. VW) brakes cost about the same but the factor to take into consideration is that the VW brakes will be all new parts and the 944 brakes will be all used parts. Another thing is with Autocross cars you'll want the advantage of the lighter VW brakes for unsprung weight on short runs. It's all pros and cons and in the end you'll have to decide what is best for yourself. Just remember with the 944 comes more stopping power but at a cost in brake and wheel weight.