I have
www.amazon.com/dp/B00I9DLB08/ref=cm_sw_r_awd_Bn6Xub04VYNMH
at home (no link because mobile). The response is significantly firmer than the ANK we use in the tower. My friend has a mechanical keyboard one srep below this, but is still firmer than the ANK. I'd go two steps down from the board i linked.
Hope this helps.