Odyssey Khartago ES or PS Audio Stellar S300?

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....

Another Odyssey/Klaus fan.  I went a different direction with my system (towards class A biasing, higher speaker efficiency), but I still regret selling my Stratos dual mono, and think Odyssey would be a great way to go, if you need some juice.
Also, and YMMV, but I've had customer service contact with both companies, and would much prefer dealing with Klaus than PSA, though he can be hard to contact (or at least used to be).