We went through the illy Extra Dark Roast coffee rather quickly - fast enough that I'm already ordering another six-pack of boxes from Amazon, which will get here today if they make good on their same-day delivery guarantee.
I've also ordered another 12-cup box for experimentation which should also arrive today - something called "Wake the Hell Up!" Ultra-Caffeinated Coffee. It's a dark roast. We'll see what it tastes like tomorrow morning.