I went with the 733. I dont trust bluetooth with the 3 wireless networks I have in my home, the cordless phones, the microwave. The list goes on, let alone what my neighbors have. Bluetooth range is pretty limited (I've used expensive headsets with limited success etc). Our baby monitor uses RF and I can visit the neighbors a couple of houses down and it still works without a problem. I would say 150' for RF is a fair bet (the 300' claims are not real world).