I don't think the heads that have failed have been due to cheap parts. They use stainless valves, better springs, and titanium retainers. However, I'd like to see them upgrade to some bronze guides, and better known stainless valves and springs rather than their own. The valves are probably Fererra and springs comp anyway, but called Patriot by them. The upgrade might help them clear there bad rep.
One problem I saw was oil leakage. Isn't this through the guides? If that's the case, then It may be cheapest to order their stage III heads for $1495.00OUTRIGHT PRICE, and have a local shop take the guides out and put some bronze guides in. Then again, the clearances may not be very close... All in all, it is too bad since you cannot beat that price anywhere.