Big Karan amps


Anyone with experience of the bigger Karan amps.
I am interested in the new 650 Monoblocks.
How does Karan amps sound compared to for example BAT VK-600, Theta Citadels, Ayre MX-R, Burmester, MBL and others?
I have Aerial 20T's.
cappuccino
Optarchie, thanks. I have Rowlands 301 in my setup now. I like their power and finesse, but I am missing some warmth and more tubelike sound. Your opinion of the Karan amps really sounds promising. I have just ordered the review of the Karan M 650 monos in the Hifi+ Jan 2008 issue. Have to check these out more!

BTW, which Theta amp did you have? And how did you find it compared to the BAT VK-600 (mono/stereo?) ?
I had the citadels and I found them a little more accurate than the bat 600s, a little more sterile and not as warm. I think the karan smokes them all by a large margin
Optarchie, the M1200s are $57k the pair. The M650s are $38.5k.

I had a KA S450 ($28.5k) here for a while and would like to get one. It drove the Sound Labs effortlessly.
Has anybody compared Karans to the like of top line from Boulder, Spectral, Gryphon, Golmund or Soulution??