I would like to know if I would see an improvement if I bought 2 tweeters to put in my mains that match the tweeter in my EC25 center channel. my mains are old no name brands so I am guessing they don't match the center. Would this be a good idea? also, the tweeters on the jbl site for the EC25 cost 12 bucks but the tweeter for the E100 costs 21 bucks but in the descriptions of each speaker it show the tweeters to be exactly the same. What's up with that? Finally, I am in canada, and it says those are the shipping costs for US only. but when I go to the international shipping link Canada is not on the list. so how can I get stuff shipped to canada? Thanks.