imo if the head is already off and you can work on it and the funds are availalbe. I would PnP, 3 angle valve job, do the valve train, unshroud the valves by cleaning up the quench area, and then put it back on.
If you have go back to do the valve train there is a neat tool that clamps on to the top of the head that allows you to work on the valve train without removing it from the block. Ask KJ about it, I've seen him use it once.
I'm not a fan of removing the head from the head gasket after a good seal is obtained. Also isn't it *not* a good idea to keep untorquing and torquing back down the head bolts?
I'm still learning here so if I am wrong ...
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if you can only race me in a straight line then whats the point 
...91 SMF SCCA
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I see people out there spending money on the car to improve it … If you spend half that effort just working on your driving skills, making you and the car work together as a team, then you’ll go faster – period. To make the car go a second faster on the track takes a lot more energy and money than making yourself drive it one second faster.
– the late Tom Thrash SCCA Solo E Production