440 cylinder head opinions?

Well its that time, im saving up to get me a new set of aluminum heads rather than spend loads on getting a ton of work done to my 906's. Iv herd a lot of posative chatter about the eddie performer RPMs, but i found some on 440 source "stealth heads" and was curiouse as to weather or not anyone was running them or had herd anything about it, because right now there on sale for a bit cheaper than the eddies.