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			I've had my 500 since the day it came out and I'm still happy with it even after playing around with a 505. 
 
For me, the difference simply isn't enough to justify an upgrade, of course the screen is better so it could be for you but feature wise, I don't think it's worth it. 
 
I agree with AnemicOak, find a display model and bring your 500 with you to compare the two.
		 
		
	
		
		
		
		
		
		
		
		
		
		
	
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