When doing my rebuild, was told that pressure testing is an awful lot of hassle and not commonly done. A hardness test usually gives enough of an indication on whether the head is good or not, and that's just a quick 2 minute test. I'd get that done and get the thing hot tanked at a shop. Potentially, get the shop to install the stem seals whilst they're at it as well, also check the valve seats for pitting and correct that if needed. Valve lapping isn't really a thing on modern engines apparently. Removing the collets and springs with a punch could damage the valve guides so unless you have a special valve clamp tool it might be best to leave it to the pros.