Smart lighting systems are meant to save energy, helping us use lights only when we need them. No more leaving the lights on at home. Wall dimmers are essential components of the smart home concept.
The best Z-Wave in-wall dimmer: HomeSeer HS-WD100+ (multitap features, control several devices.)
The best affordable Z-Wave in-wall dimmer: GE Z-Wave In-Wall Smart Dimmer (12724) - simple, effective, cheap