For WiFi I think the general consensus is Lifx.. replacing bulbs for home automation can get expensive and complicated especially for recessed lighting where individual bulb control is not really necessary nor is changing colors. Table Lamps are good candidates for smart bulbs.
I agree with @brad5 that Caseta works great but the style might not be to everyone's taste. You might also consider installing Z-Wave or Zigbee switches...and leave the bulbs standard LED.
