Yeah, I'm just about to start on Scalped myself. Only a dozen or so pages in at the moment but so far, so good. I think Goat recommended them to me ages ago and I had so much on "the list" at the time that they just slipped through the cracks. Now I'm in a bit of a lull with only really The Walking Dead a guaranteed purchase when the tpb's come out, so I've been trying to recall the "ones that got away".
Aaron's two Punisher MAX collections are thoroughly recommended if you like the Welcome Back Frank run by Ennis. Steve Dillon on art duties so it really harks back to that era and as I say, his MAX universe setup for both Kingpin and Bullseye are great and instill those 2 characters with a real sense of danger, malice and brutality. Kingpin is frighteningly ruthless and brutal, and Bullseye is full on deranged.