Pass Labs amp choice for CLS - What would you do?


After much reading and soul searching I have decided to upgrade the amp on my CLS speakers. I can buy a used X350.5 (current generation) or a pair of X600 mono blocks (previous generation - can't afford the X600.5) for a similar price. Is the .5 model change significant? There is no way that I can audition/compare them on my system, so I will have to take a leap of faith. I know I can't go wrong, but what would you do? And what pre-amps should I be looking at?
dchazen
The X-600 amps are GREAT! I had a pair for 2 years and am a huge Pass Labs fan. BUT they put out TONS of heat. That is the only reason I sold mine. I went with EDGE NL 10.1. WOW! Way better IMHO. Way cooler, more detail, smoother, better imaging. Highs to die for. 1/2 the footprint.
Dchazen, take a look at my Gon reviews of the 350.5, XA-100's and XA-30.5's to get the details why I would select the 350.5 over the X-600's. I did not care for the X-series amps sonicly, but the X-.5 series are great sounding amps.

Srwooten, I'm glad that you love your Edge 10.1 in your system. I had an Edge NL-10 and enjoyed it very much, however when the new X-.5 series came out, it was much more musical then the NL-10 in my system. As stated above the X-series amps to me were somewhat cold and steely sounding to me, but when Nelson Pass came out with the X-.5 series and then the XA and XA.5 series he nailed it and I believe that he surpassed the Edge gear in its sonic performance.
Srwooten, I hope my comments regarding my experience with the Pass amps compared to the Edge was not taken by you as a put down or negative statement about you or your experience regarding the X-600's vs. 10.1, if so I'm sorry if it came across that way.

The Edge amps and the Pass Labs amps are some of the finest sounding SS power amps built today. It really comes down to personnal taste and system synergy.