You know, I thought about a HOB. But what I've researched/seen is that the Tunze filters do a great job by themselves. I like a few of the features too, like the hidden compartment for the heater, and that the auto top-off can be hidden in it as well.
You just don't want them taking up space inside your display. It will get cluttered very quick. I use a HoB skimmer and a regular HoB filter on my tank. I have no complaints about either. The filter is nice for cleaning my water surface and being able to add carbon, filter floss, or chempure if need be. Skimmer can come later too. Lots of people don't run them at all. Worry about flow, testing, making your water, rodi system, heaters and hardscape. The rest you have plenty of time to research and figure out.
That is a good point, I def don't want too much inside the tank taking up the display. I can always hold off on getting a skimmer for the short term, maybe I can get a cabinet placed skimmer.