I figured out that the only way I was going to ever sleep at night was this:
So today I got the damn chair, or one pretty much like this anyway... Office chairs are too g'damn expensive, for the record. But let me tell you, it beats the hell right out of a broken kitchen chair that sits too high, and it has a 3 year warranty. My feet and legs haven't been asleep once all day, they don't ache at all! My fingers are still numb but I think that's just going to be a point of my hand getting used to being in a better position.
So. Yay me! I have a new funky chair, and blood in my toes! Here's to hoping I can sleep now.
This is how well it worked out.