Krell KAV 400 xi for Magnepan 20.7's?

Hi,  I am buying a pair of Maggie 20.7s and will be buying a Magtech sometime after the spring of next year.  Until then,  I have a Rogue Pharaoh which I couls sell, or use as a pre-amp with a more powerful integrated such as the Krell KAV-400xi for the time being.  I know it's underpowered and I'll end up selling it.  Any thoughts?

Best regards,  Bob