Assuming your cut-off for "cheap" is under $50:
At this point, I don't really put Logitech or Razer in the cheap-but-good category. Logitech's cheap products aren't nearly as good as they used to be, and though they are usually quite good, Razer's products rarely fit a price point that low. My favorite entry in the cheap-but-good category are the hardware from Microsoft. Don't go wireless unless you have your heart set on it; just keep it simple.