Yes it will work--I have an OTA indoor antenna with a converter box and a roku. Roku will be attached using the red/white/yellow inputs to your TV while your ota attaches to the cable attachment. I chose the middle box ,the XD, because it supports N wireless ( more strength)and it works fine for me.
I think you will be very happy with your choices. Check out the free month of Netflix movies, add the free channel PUB-A-DUB and explore the added options you have with ROKU and layered Digital programming on your antenna.