I have a good treadmill. What else can I get that won't break the bank? When the snow is melted off of the football stadium steps I give those a good workout. Until then I am wondering about some kind of stair-stepper machine. Big-box stores have them for less than $100. Has anyone tried them? Good ones, bad ones? other suggestions? I really found last year on my hunt that I wished I had done more vertical training than flat running, but that's hard to do here in the flattest of the flatlands.