I am trying to convince my dad to let me sell my 250ex and let me buy a 400ex. I have had the 250ex for about a year. I am starting to get too big for it and I am looking for more power. Please reply with some reasons why the 400 is better than the 250. Or just list some pros and cons. 
Thanks, Matt.
				
			Thanks, Matt.
 
				
		 
 
		 
 
		

 
 
		 
 
		