dondon, SC is still good in the 4/3 deck, because of the interaction you point out (SC+Quarry=GM), but it's not the insane powerhouse that it is in a 5/2 deck (giving $4 for the Quarry when you don't have the combo, and later, as you point out, giving the GM). I feel it's still something you want though, but the 4/3 deck just can't/won't work on anywhere near the same efficiency as the 5/2 deck.