I don't think what your looking for exists at the price point you want it. At
least not without doing a bit of work.
Essentially what you need to do is:
1. Buy a system that is NOT branded by Dell, HP, Lenovo/IBM, or Toshiba. That
will ensure you can replace the wifi card with a free software friendly one.
2. Check that it is using Intel graphics only and does not have NVIDIA/ATI
graphics.
3. If you can test it for a week that would be ideal. Otherwise you may
discover problems later (suspend to ram works, but not properly, or the wifi
worked, but for some reason the system disables it and there is no way to
re-enable it).
