Odyssey Khartago ES or PS Audio Stellar S300?

The Odyssey will be more engaging and have better texture in the mids/highs (like has already been mentioned).  Be aware that Odyssey has a completely manual turn-on switch (no remote trigger turn-on input).  This is really just a convenience item, unless it bothers you.   Another thing to know is that Klaus likes to use really small 400VA transformers (even if they are stacked).  This means that Odyssey will not have the deep bass muscle/fullness that other amps may have due to transformer size.  Even though Klaus can load 120,000uf, the ultimate power of the amp itself is still really driven by the size of the transformer.  This doesn't mean that Odyssey isn't an excellent amp (it's really very good).  The PS Audio -may- have better low/deep bass due to Class D operation, but it only pushes 140 watts into 8 ohms, so it is not a power beast either. 

I have heard the PS Audio S300 amps and they are quite good for a Class D amp.  They aren't really "flat" sounding like other amps.  Their Class A input stage is really nice.  But I still think the Odyssey will be a better sounding result in the long run.

Odyssey uses I think 850’s now.
850va transformers. Not the 400.
I think it’s an option for the 850,.....
don’t quote me, one needs to call klaus for this. 

Thank you all for your detailed explanations. Odyssey sounds like a must in my search!

@auxinput,

My previous Stratos had two 400VA transformers and 180,000uf of Caps and the bass was amazing.  Much, much better than my 2 previous Classe Ten and Fifteen amps and my Conrad Johnson MF2550 amp.  My 300wpc McIntosh Amp betters them all but compared to the Stratos, just a bit better.  

So.......

what have you gone with?

  The Odysseys are great.

   We bought a 15 year old stratos pair probably 4-5 years ago (in early 2010’s) red board, small black caps, didn’t keep up w my modded cerwin Vega D-9 pair. They beat up crown, QSC, and others. As well as the original odyssey amps I bought 

   Low volume, they were simply amazing!

  Contacted Klaus, he upgraded them to kismet monos, better parts, top VA transformer, the huge beer can caps by symphonic line. 
   They brought the Vegas to life, as well as my other speakers. 
   The worst is the break in, as hundreds of hours are needed!

 When I shut them off,....it took a good 5-6 days of being powered on to achieve that sound........

 keep us up to date....