Advice on separates

I have never bought separates before. I just bought the new Pioneer plasma, and a set of 7 piega speakers (p4L/xl, p4c and s3's and rear centers). I ordered a standard receiver but have now decided I want to go high-end. I was thinking about Krell Showcase 7.1 and amp or Lexicon MC8B and Lexicon LX-7 amp. Any advice between the two and/or other models? FYI, I am based in Asia so dual voltage would be convenient but not required as I can get a voltage converter (I am told Krell's are not dual voltage).

Thanks for your help