Worth the effort?

By my research this engine has the stock iron magnum heads, which are not blessed with impressive flow, nor impressive potiential flow (please say correct me here :) ). What are the next step up in flowing heads that suit this motor but are cheaper than shelling out $1000+ per head for Edelbrock RPMs or Trickflow heads.

somehwere on my (usually) right shoulder sits a little nasyt saying that I need about 400+ hp and 450+ ft-lbs which by researching I'm (hopefully wrong) convinced that the stock heads won't support.