I think the Tunze 9002 or the Deltec MCE-300 are the only small tank, not drilled compatible skimmers that are useful.  I wouldn't buy any of the others. 
 
If you're drilling the tank and using a sump there are lots of great options. 
		
	
		
		
		
		
			
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				~ Mindy 
 
SPS fanatic. 
			 
		
		
		
		
	
		
		
	
	
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