KEF is a reputable speaker company, and you are unlikely to be disappointed with any of their Reference Series speakers.
However, the only ears that matter are your own. For a significant investment like that, it is worth the effort to audition the speakers in your home, with your electronics, or to bring your electronics to the dealer to hear how they sound with the speakers you are considering, before finalizing any purchase. Most dealers are happy to work with you on things like that. That is the extra level of service you get with a high-end dealer that you don't get with a mass-market retailer.
However, the only ears that matter are your own. For a significant investment like that, it is worth the effort to audition the speakers in your home, with your electronics, or to bring your electronics to the dealer to hear how they sound with the speakers you are considering, before finalizing any purchase. Most dealers are happy to work with you on things like that. That is the extra level of service you get with a high-end dealer that you don't get with a mass-market retailer.