I saw priest live for the first time last weekend (and then they went and announced another show I'll be going to when they announced their deep purple tour) and painkiller was the only song I wanted to hear. That entire album represents my favorites parts of priest and my general heavy metal tastes.
I think halford sounds better live than dickinson too, as a huge maiden fan.
Quite honestly Priest and Halford both have done a far better job of being steady in their releases and abilities. Maiden just fell off hard around or after Fear of the Dark. Some good tunes here and there but I've actually considered selling everything after FotD where I'm considering buying the Priest discography. At no point ever do I feel like listening to Blaze Bayley and even the newer Maiden that I kind of like is just meh anyway.