I have a 48x13x20 and wish I had a deeper one the 13" front to back is too narrow for a good live rock aquascape. I do like the 48" length though and would have gotten a much larger tank from the start if I knew like a 75 or 90 gallon.
Next tank will be a 180 gallon 72x24x24

coulda shoulda woulda.....oh well there is always next time lol.