Some of these choices are pretty stupid. I know it'd be heavy on Roland to include the 707 and 606, but those are both sick as well. If I had to pick a newer drum machine to make the list, it'd have to be the Korg Electribe ER-1. Kind of changed the game a bit.
agreed with pipecock. also, not sure if they qualify (don't see why they wouldn't) but where is the MPC series? seems silly not to include at least one of the models, especially since most of the drum machines listed are hard to find and much easier and more affordable to simply sample.
Well to excuse the lack of the MPC, it seems that everything they chose has internal sounds. This explains the SP-12 being in there while the SP-1200 is not. To me the SP-1200 and MPC60 should be 1 and 2 with the Rolands, Linn, DMX, etc after it.