Hi there,
Not sure that DSP 7000`s or 8000's are better than other speakers mentioned, different maybe more convenient and tidy maybe but better not so sure we have 8000`s and currently we have a set of Quad 989`s with Velodyne DD15`s and they are also very, very good, different but good and the point about soundstage, open, airy, transparent, mid range and bass and so much more can be equally said of most high end systems it is very subjective.
The friend who we got our 8000`s from has a pair of Wilson Alexandria`s they are just phenomenal but at a massive cost but again subjective.
So my advice would be listen to your ears let them do the talking get a home demo if possible or at worst take your source and amp to the demo venue.
And if you`re in the UK talk to a good importer who may advise you on how to bring in goods from the US without incurring high duties?
Tim.