comparation between Magnepan & KEF ref. series

Hi friends . I wish to know opinions about the MAgnepan speakers. more ecxactly about the Mg 1.6 qr . If some of you really knowabout this, please answer me. I have a pairof KEF ref. series 105-2, Would I do right chanching tham for the Magnepan ?
my ampli system is Threshold FET one preamp and Nakamichi PA 7 power amp.
Thanks