Eldo1968, wait about 2-3 weeks on your 51se. It will seriously open up. BIG. Leave it on with music going through it. About once a week...power it down fully-NOT standby...want a few hours or overnight. Something speeds breakin at full powerdown and discharge of the caps. After breakin, it's almost like listening to something different than what you have right now.
I've used a Kimber Palladian pk10, Trans Ref XL, Fim Gold. So far the Kimber is best for me. Purist Dominus or Opis is next. Given how much the Purist has done for me on the interconect side...I think I'll love it as a power cord ...