Healthy Head?

Neither machine shop I deal with would let that head leave without at least lapping those valves in and more likely touching them to the valve grinder while they were out and apart, and cutting the seats even if only enough to verify they are concentric, and new guide seals while it was apart anyway. And minimally checking for warpage with a machined straight edge and a feeler gauge/ if not a trip across the mill
And personally I wouldn't want to take that head home without that amount of work done, at a minimum
...

Head work can get way more in depth than that easily.
But the R+R you are doing is no different with a properly redone head than it would be with a rattle can rebuild head like you got.... But the difference in results can be huge.... Might mean the difference between having a redo on your hands sooner than later