Yes, I was surprised they didn't have a Graham Phantom Elite 12" or Kuzma Safir 9" mounted as well (with the same cartridge) so they could swap back and forth between the two; that's what I would have done.
Only if you are 100% confident that your offering is sounding better than the comparing offers
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Digital: Lampizator SuperKomputer, Lampizator Pacific, Lampizator Golden Atlantic 2 TRP, Resolution Audio Cantata MC
Preamps: Silvaweld SWC 1000 R, Aries Cerat Incito, Symphonic Line "Die Erleuchtung"
Poweramps: KR Audio Kronzilla SX, Lamm M 1.1, KR Audio VA 350, Sphinx Project 14 mk3, Luxman M03
Integrated amps: Ayon Crossfire III, KR Audio VA 350i
Horn Speakers: hORNS Universum, Odeon No. 38/2, Living Voice Air Scout, Odeon Midas
Dipole Speakers: Apogee Studio Grand, Apogee Centaur Major, Acoustat Spectra 22