If you had $12,000 for speakers and amp

I thnk there was a typo in Teejay's spec for the Pass X-600. Perhaps he meant to say 1200 watts.

I would buy some used Wilson Benesch Curves or Coincident Super Eclipse v3's and some used Manley 250's.

You don't specify listening style or types of music so I'm just listing my own personal opinion.

Eminent Technology 8s for as little as c. $1200, Quicksilver V4s for $2500 - $3000, an Outlaw 755 or 770 ($1000 - $1700) for the bass modules, and a couple-hundred dollars for the electronic crossover of choice.

You'll end up with GREAT sound--huge, spacious soundstage if you can get them 5 - 7 feet from the front wall, highly transparent and revealing, and well-extended, well-defined, tuneful bass--for c. $7K. Buy better somehting-or-other with the $5K left over.

A caution--if you listen at high levels, say, peaks well over 100dBA, the 8s probably aren't for you. But they fill my 3200CF room VERY easily with FIFTY Watts on the MR/treble!

See my system at http://forum.audiogon.com/cgi-bin/fr.pl?vdone&1126390461&read&keyw&zzjeffrey%20s .
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Atmasphere or Joule OTL monos paired w/Coincident Super Eclipses would do it for me.

Depending on your taste and room size, I will suggest:

Sonus Faber Cremona + some tube amps or a good solid state for under $10k

Dynaudio Contour 5.3 or Confidence 2 + a good solid state amp for ~$10k

Verity Parsifal + some tube amps for slightly over $10k

All three speakers will give you lots of listening pleasure.