Maybe z-wave but with an universal bridge (even though, none is really finish for now, all are still pretty new or complicated).
But xiaomi seems to be the choice to go with. Not expensive but of good quality.
And all sensor exist (maybe just not the luminosity sensor?)
Other than z-wave, maybe 433Mhz is the other cheap and battery powered device you can find.
Motion detection, humidity, temperature, window/door, leakage, smoke detector, … all exist in 433Mhz.
You can find a list of available sensor here: