Only seeing one zwave device, but it doesn't have built in GFCI like the radiant floor manufacture wants.

 

I am now thinking of just buying the cheap non-programable floor thermostat and using a higher amp zwave switch to stop/start the entire system.  Any thoughts or suggestions?

Replace the non-GFCI breaker with a GFCI breaker. You also need to ensure that the floor covering temperature does not exceed the covering-specific maximum temperature, e.g. 82 F for anything but tiles/stone (104 F). This requires a floor sensor embedded in the heater substrate. There aren't many thermostats that have inputs for floor temperature probes.

I've been using the NuHeat electric underfloor heating system for several years now.  There's a node server in Polisy that allows you to connect and control these units through the ISY.  I really like these devices - it's wonderfully-even heat.

Should also point out that the NuHeat thermostats contain built-in GFCI breakers.