Looks like you're putting together a really nice system.

Call me crazy, but if I were you, I'd get a new Hsu sub, before upgrading the surround speakers. The Hsu will make a much, much bigger difference in the enjoyment of your system than new surrounds. Start saving for their STF-2. You may think your JBL sub is good, but only because you've not experienced what a real sub can do.

btw...a smiley face is easy.

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I'm sure there are more, but I don't know them.