Lime Smart Lock
Not sure whether you guys heard of Lime Smart Lock. It's an all in one smart lock ( internet connected, NFC, rfid, Bluetooth and pin code)
Check out their campaign on Kickstarter
Well. I am not too confident about Lime Smart Lock that where is it being prepared but I heard 100 times about NFC and Prime Source's smart door locks that delivered top quality locks over the globe.
I like Kwikset locks. Although one blogger writes that Schlage is good too.
P.S. I think you should read, Richard knows what he is writing about. Good luck (Richard`s blog)