Paradigm 3f, KEF reference 3, Monitor Audio PL300II


I've been auditioning speakers in the $15,000 range and am almost ready to decide.  My short list right now is the KEF Reference 3 and the Monitor Audio PL300II.  I'm planning to hear the Paradigm Persona 3f this weekend.  I've also heard speakers from B and W, Wilson, Wilson Benesch and Proac but none made the final cut.  I really expected to be blown away by the Proacs and, while they were very good, I prefer the KEF and Monitor Audio. Unless the Paradigm is even better, it will be a tough call. They both seem to have great imaging and soundstage, reasonable bass and pretty life like presentations.  We all know how hard it is to compare and contrast speakers, especially when there's a large time gap between listening sessions. The Monitor Audio dealer has offered to bring them to my house, set them up and let me live with them for a week at no cost. Sounds like a great offer but I don't want to accept if I'm leaning more towards the KEFs.  Any helpful advice would be appreciated.  
puli
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The monitor audio platinum series is one of the most neutral speakers I've heard to date that's why I love them they just give you whatever you're playing and if your front end is crappy then that's what you'll get coming out of the speakers crap. If your wires are bright you'll get bright if your wires are dull you'll get dull. Very revealing speakers. I bought the platinum 200 generation 2 and I don't think there's a speaker at double or triple the price range that'll beat them. That goes for the whole line the 500 will beat the magical q5 and the Wilson Alex no problem.
If you believe that then your search is over, congratulations. There's no reason to tear down any other brand to do so. 

the paradigms with the beryllium Tweeter and midrange are edgy and bright as hell cantuzzi and audiotory are sellers of paradigm so naturally they're going to say good things about them, and they're so overpriced it's not even funny the platinum series walks all over them in three dimensionality and the MPD Tweeter is way more natural and open than three-dimensional, the paradigms aren't even in the same league as the platinum, and I've never heard an American speaker that sounds any good.