440 source

I ordered my RPM's bare. Had my machinist cut the intake seats for 2.19" valves, did a valve job, sized the guides, put oil restrictors in both heads & put them on the flow bench after I worked the bowls & ports. Used PAC springs, Comp tool steel retainers & 10* locks and T&D rockers.

I think you're getting a decent head for the money, in a bare casting. Which is what I'd suggest buying, no matter who's you decide to go with. Have a good, reputable shop go over them. Then buy the best valve train components that your budget allows, and I think you're in business with Edelbrock, Indy, or even 440 Source.