The Current Orbit SHOULD be ok, especially for beginner corals. I have a DIY setup that is similar and I personally like the programmable features that goes with this setup like the ramp timing. The clouds and lightning feature I have in mine makes for a neat although sometimes distracting feature.
You can use a breeder for a sump if you have the room for it. If you can set one up I would recommend it. The main advantage to a sump is the increased water volume. More water means lower salinity swings with evaporation.
You also need to make sure you have enough flow in the tank. The live rock is your main biological filtration and, with enough flow, you really dont need the HOB
filter except to use as a 'water polisher". (That assumes you dont overfeed your tank)