triforcemario					   
				   
				   
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				   May 18 '06
			    
			   HD-DVD. without a doubt, because Blu-Ray discs are extremly expensive to manufacture (for example, because of the disc format, PS3 games will cost on average 70/80$), and unlike the upgrade from CDs to DVDs, factorys would need to replace the majority of the machines which makes the Blu-ray discs, while HD-DVDs are a lot cheaper to manufacture, and factorys won't need to be completly upgraded to be able to manufacture them.