amps for a new Jmlabs Be altos

With so many choices I'm going crazy first I thought because some people think that the utopias are bright I thought tubes ASL hurricanes deHavilland Aries 845G Then I see alot of talk on D amps Spectron Acoustic Reality Now maybe I am thinking main stream like pass labs 250 I"ve got 4-5000 to spend on monos but what the altos are 92db efficient supposedly my room is 15x16 I want to ran my granite audis 657 straight though the amps it has it,s own volume control this is a tube cd player sounds great by the way. Is their help out there.