Speaking of heavy iron, a nice inexpensive power amp is the old black colored JBL/Urei 6230 or 6260. The 6260 weighs about 75 or 80 pounds and is rated at 150 watts a side. They show up used for about 150 bucks because a) no one wants to lift them and b) everyone thinks 150 watts is to small for most applications especially when considering the weight. Did I mention they're heavy?
They spec and sound very nice and are basically bullet proof. Not a high end boutique amp but FMM a lot better than any similar rated QSC, Crown, Crest etc. and 1/2 the price or less.