I want upkeep to be simple as well as accessability to doing cleanings. I also want a visually appealing tank without looking at the equipment, thus creating a back compartment for the filtration.
I don't mind a little work on setting it up the way I want it to be. I had to do alot of custom work for my 2.5g saltwater tank, but all the work and thought put into it paid off with an easy to maintain tank (excluding having a good cover on the filter/refugium which half a year later crashed the tank when roofers knocked materials into the tank when working on the roof).
I could use the old equipment I have left to redo the 2.5g, but at this time I am thinking of having a smaller tank on my desk so I have more room on my desk... but again, I am still planning... I am not in any rush since a well thought out tank will be more rewarding than one slapped together quickly.