RPM range for my custom cam?

I am getting ready to order a custom cam for my new motor build and am trying to figure out what RPM range I want in the cam. The motor will be an all forged A4 block Kenne Bell supercharged 336ci, heads are wicked ported TFS that flow over 300cfm @ .550 lift and have oversized 2.05 intake valves. What kind of RPM range should I request?
 
Where ever YOU want to make power. Don't ask us, its YOUR combo.

My cam is 3200-6400, not too high at all because i'm using a stock block. If I had a real block i'd want to shift around 7,500 but for now, 6,800 is ok :)