The MSD Wah I mentioned earlier seems to cover everything. It has a pressure activated switch on the treadle, or a footswitch, so you can activate it when you put your foot on it, or just turn the pedal on or off. It also has the clean blend mode, and you can set the mix with an internal trimpot, or just have classic straight up wah sounds. A parallel output is always handy, and with 3 frequency bands and 4 sweep ranges to choose from, gives you 12 possible combos, or 24 if you include the switch between blended and straight. Really versatile! Seems to have quite a few of the features you would want in a wah pedal.