I am not recommending a type/brand/model of head, just recommending upgrading the materials/quality of the seats and valves.
It depends on what your boost and temps will be.
The heads you are looking at might be OK for 7 lbs of boost, but how will you know? What happens if you drop a valve seat or burn a valve. I'm saying your application may be beyond what the machining and components of the heads are designed for (regardless of price.)