How much are 360 heads (non magnum) worth

'308' heads off a 360 van or truck are very good newer 360 LA heads, great exhaust port. Going AL? Speedmaster?
Still looking at head choices but Edelbrock Performer RPM, and Speedmaster are both at the top of the list so far. This car will never see a turbo or supercharger so I don't need to go insane with this, but new aluminum heads will flow better than these, even with a good port grind and valve job. Having a warranty is a nice plus also.