Looks very tall like you said - You can get the long handled algae scrapers to keep the glass keen - Or some suckermouths.
I reckon if you can afford it get an external canister filter with an inbuilt heater - I think eheim have this option- Theres two less things that need to be in the tank - Also it be grouse if there was a hole drilled near the bottom of the tank at the back to take the intake for the filter. You'll need silicone and proper threaded fittings inside and outside the tank. Then you could have the return bar on the top and the intake at the bottom without any hoses to be seen inside the tank. Do you have a hood and Cabinet? Maybe consider discus, or some other type of large round fish.
Maybe cause its so deep forget about plants and use bogwood and rocks. Might not need any lighting then - can go towards your thermo canister filter.