Best Preamp for Ayre Acoustics CX-7eMP?

Hi,
My system :
Ayre Acoustics CX-7eMP
Belles Aria preamp
Maker Audio G7 Amp
Tyler Dx2 speakers

I'm considering replacing the Belles Aria with a Ayre K- 5xMP preamp.
Any other suggestions or comments on the Ayre preamp?

Thanx