As far as rubber domes go, I think Compaq made some pretty good boards. I picked up a new-in-box one at an electronics recycling place a few years ago - when the guy showed it to me I said no, don't really need a keyboard - then I tapped on a few keys and it was solid, not mushy, has a pleasant sound to it, just felt great. Sold! It was $15, I think. After a couple days though, my wife said it was way too loud, so I stopped using it and eventually donated it to the swap shop.