The amount of live rock depends on your plans.. less for reef, more for fish only with live rock, or if you have a skimmer. 
 
The rule of thumb is 1-1.5lbs per gallon.  I have around 40lbs in my 33gal. 
 
I would also get rid of the fluval & get a skimmer instead, unless you are only planning on running carbon. 
 
A sump is a better idea if you can, I just upraded to a sump, and never will go back. 
		
	
		
		
		
		
		
	
		
		
	
	
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