Go with an all Krell set up and you should reach nirvana.The amp has to be a KSA 300S or a FPB 300,or better yet a FPB 600.A KRC-HR pre as well.I take it,if you spent $10 K for the Confidence 5 speakers,why save on your front end(your heart).Go for it,I did.All I can say is the Confidence 5's are amazing,they just need mass to open them up.(P.S.the new Pass labs will also satisfy-X350,or better)