I'm not sure about bang for the buck, but I definitely think they're great speakers. The 7006 is the "lowest end" of the supertowers, but with all the supertowers you're getting great lower-end extension. They can truly be run full-bandwidth without a crossover with no worries. Also, if you like that bipolar sound- they have that in spades.
I think BigDaddy has a higher model of the supertowers, but he loves them. I've listened to them quite a bit (at Magnolia BB and other stores) and I think they're awesome. I currently run the BP6's, which are the smallest of the bipolar towers- they have no sub.
If it were MY money, I'd be getting some Def Tech Supertowers. I personally love them. However... it's your money, not mine. At that price range, I suggest you try and listen to other brands. Monitor Audio, Paradigm, and many others should be available in speciality shops for you to listen to.
(But the DT's get my vote!
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