Welcome!
Light Switch - Lutron Caseta (you can read how I got started down this path here: "Best" Lighting Solution)
Motion sensor - CentraLite/SmartThings/Sylvania - all made by CentraLite (I think CentraLite also made the Iris ones), Nyce
Thermostat - I don't play here. I have a Carrier Infinity system which is highly proprietary.
Door Lock - I have a Schlage Z-Wave. I cannot recommend it.
