A friend of mine needs a new keyboard, but not just any keyboard. He needs one with a super large "key buffer" that can handle an "infinite" number of "key combinations" at the same time, not just 3 to 7. It must be under 150$ total. He does "not want wireless" and needs the keyboard to be "ergonomic with a blackish color" to match the system. Anyone have an idea what he should try and pickup?