If you mostly just grill, try one of these infrared units: 
http://www.tecinfrared.com/Outdoor/C...eries=Overview
This thing works with propane, has a ceramic grill and is totally portable. It sears whatever you're cooking and does an amazing job. I've owned one of these things for a couple of years now, and I really like it. Gonna cost you a bit more than $400 though.  
		
		
		
		
		
			
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				"The gift of liberty is like that of a horse, handsome, strong, and high-spirited. In some it arouses a wish to ride; in many others, on the contrary, it increases the desire to walk." 
 
-- Massimo d'Azeglio
			 
		
		
		
		
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