Opinion's on Showcase vs. TGIII vs MC-8

I need a new pre/pro to replace my Sony TA-E9000es. I want to have analog pass-thru for a multi-channel SACD/DVD-A player. You would think Sony would offer this since they created SACD. However, the only piece that Sony made (TA-P9000ES) has been discontinued. So now my search begins for a new pre/pro. I currently use Parasound amps (3x220W, and 2X205W) with JMLab Cobalt speakers all around. I will probably upgrade the whole system,but need to upgrade the Pre/Pro first. Please provide any input on the following processors.

Krell Showcase 7.1 - $3000
Sunfire TGIII - $2600
Lexicon MC-8B - $4500
Aragon StageOne - $3200

If I really want to stretch the bankroll.... Krell HTS 7.1 for $5500. would rather not have to spend that much, but If it's that much better than the others I may take the plunge.

Thanks in advance
Paul