Okay, so I've been reading up on both of these, Gecko is the clear 'winner', but I don't know why. What are you really paying for in the Gecko that's so much better than other drivers? Like most others, I'm on a tight budget and the HobbyCNC kit looks tempting for my first CNC. I don't expect I'll be using it all that frequently, just for little projects and things, so I don't care about IPM much.
Also, another noob question, on the Gecko website under the 540 page, what's the left hand column in the prices list (the side that ranges from 1-1 to 10000-20000)?