I would also consider an external pump - it transfers less heat to the tank.  When doing this remember you will need to plan room for your pump AND your plumbing.  When I did mine I had planned for a external valve to isolate the pump, but I ran out of room so I had to scrap that plan.   
 
Also some people have been saying that taller is better, but this depends on how tall your stand is - if your sump is too tall and you are using an insump skimmer it could be too hard to remove the skimmer from the sump and stand to clean / maintain it.  (or the collection cup in my case.   
 
I would definatly include an ATO, as well as baffells to prevent microbubbles from entering your display. 
		
	
		
		
		
		
			
		
		
		
		
	
		
		
	
	
	 |