Preamps opinion

Hello all,

My setup contains atc scm 40 mk2 speakers, hegel h160 as a pre, and bryston 4bsst2 power amp... Now I want to change my hegel h160 with a dedicated pre amplifier. 

My candidates on second hand are bryston bp26, audio research ls 26, ref 3, ref 5se(if i find budget)

What are your opinions about these matches?