Why not add a large hadron collider to the wish list? The cool kids are only doing quantum gastronomy these days.
Seriously, I'd second that the centrifuge is probably more practical. I've been dying to play with a rotovap, and seriously investigated one once, but they're very big and very fragile, and it seems unwise to buy a used one unless you 100% know what you're doing, which was far from my situation. And new ones of course cost a bundle.