derek's 90g build, red deer

Does anyone have a good cube size tank suggestions? I am going to be getting a new system in march and would like some ideas. I will be selling my 90 Gallon. And going bigger but would like a cube or a shallow tank. So any ideas would be great. Mixed LPS with some SPS. Recommend lights would help me out also, sump size over flow ideas bla bla I new to this so throw anything at me. Thanks