Need recommendation for my hybrid system

Hello all.  I have a pair of SF Evolution monitors and a SF Amati front speaker l,  a Krell 3 channel amp and a title CD player.  I can’t decide on an AV Pre/Pro but I’d like to get started with some audio.  Looking for recommendations on a good pre amp and would like some input on which one to get. I’m considering an ARC ref 5SE it Ref 6 or the Krell e 202 or maybe something from pass labs.   No particular brand loyalties, just looking for the best bang or boom for my buck. My hybrid system is 60 audio/40 HT.   Thank you.