Please recommend a PreAmp for my 5.1 home theatre system


I am putting together a system - so far have Krell Chorus 5200 for the Amp, and Focal Sopra No 2 speakers, along with Sopra center and Aria rear channels.  Samsung TV mid range M series.  Can you suggest a nice preAmp to work well for this system.  Budget 4 k tops.   Thanks!
hortense5