The only way you're going to get everything you asked for with a hobby grade heater, ie: LCD screen, very accurate, and good quality, is to buy a controller to go with your new
heater. The best way to go, IMO, is to get a
Reefkeeper Lite (RKL). You can control your
heater, lights, pumps, fan, Ca reactor, and chiller with the
RKL. If you wanted to pick up a Ranco Controller to control just the heater, that will work too. The cost of a Ranco Controller is not much less than the
RKL and therefore makes the RKL a much better deal.
Heaters are probably the #1 piece of equipment to fail in this hobby. Any hobby grade heater should be protected with a controller.
Hope this helps,
Russ