The EXR7s is the best key feel by far. The GW-7 has very tiny keys, like an accordian. Also, the EXR3s and 5s don't have the goodies that the 7s does, so for the extra money, I'd go with the 7s.
Live: PA 3X / 8.2s / Zed 6FX / Blue Encore 300
Studio: PA 3X / HS7s / Zed 8FX / Baby Blue / Tascam DP 03CD