Whats the best power amp $1000. for Magnepan12s?

Presently I have a Bel Canto S300iUSB and ARCAM A65+ paired with an old but cherished set of JMLab 3.1 Dalines. I just received my new MG 12 and am in need of some additional current to help my Maggies move some air when using the S300iu as my MacPro as a source. I need to find a nice sounding power amp that would go with the Bel Canto so I can keep my ARCAM with the JMLabs as a second system - or sell them to help fund a nicer amp. Anyone have the amp I need?