Best Tank Dimensions

[CamBarr]

Hey guys need some input on tank dimensions, what dimensions will give me a sort of cubeish look would like the tank to be under 50 gallons??? tank will be used mainly for sps and would like to save space to the wider i think the better. This tank will be going into my new flat and it needs to have a very modern euro feel so it will be braceless or euro braced and will have some sort of pendent lighting system I was thinking T- 5 to save on Elec and heat.

Thanks for your help