There is a MF A5.5 for sale here in the integrated amp section that fits your budget - get that and call it a day - it will match nicely with your B&Ws.
(no affiliation to the seller)
I use the older A5 with my B&W CDM1NTs - great synergy and match.
(no affiliation to the seller)
I use the older A5 with my B&W CDM1NTs - great synergy and match.