I'm using Ultralux pushbuttons with the standard supplied E-Switch microswitches.  The combination is a bit stiff for my tastes, but if I take the spring out of the pushbutton and use only the force provided by the microswitch, it feels great.  
Does anyone foresee a problem with this setup?  I figure the microswitches are subjected to nearly identical forces every time they're pushed with or without the pushbutton spring, so I don't see a problem, but maybe I'm missing something.