Pete,
refresh us on the symptoms.
When does it get hot?
Doe it just climb and climb? Can you idle and stay cool or does it get cooler when you drive then heat up when you slow down? Have you preformed any tests?
cylinder leak-down test?
System pressure test,( does it hold pressure when you pressurize the system? Does pressure build beyond 14PSI? Have you checked for exhaust gas in the coolant ?
Have you verified that your gauge is accurate?
Could you have a collapsing hose?
As for gaskets I prefer Fel-Pro Performance Head Gaskets ($60/set from Summitt) a bit more pricey but they provide a solid product.
good luck.........I'm chasing a similar gremlin on my sons car AND I checked the gaskets, replaced waterpump, radiator, hoses, fan, pressure checked, flushed and it still gets hot when we go over 50MPH.
take care,
MIke