CISCO: conditional port-based NAT (policy-based PAT)?

I have a problem to nat-translate inbound http packets to different local_ips based on some condition (like dscp bits set). Actually the dscp bits get set on the incoming trafic using NBAR. I hope NBAR happens BEFORE nat translation on the nat outside interface. If not maybe more sofisticated solution needed.

Here is what I need approximately:

nat inside source static tcp  80 interface  80  
nat inside source static tcp  80 interface  80