Best sounding Krell ?


Let's say I had $4k for a power amp. and was looking at used Krell power amps. Which Krell would you consider the best sounding of all the different models in the last 10 years? Of course this is all subjective but based on midrange, bass and all the other attributes we audiophools crave.
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The cx series of the Full Power Balanced amplifiers is/was Krell's most advanced state of the art of the FPB series. My other extensive listening experience was to audition at several venues an FPB 600 circa 1997. In my opinion the cx series captures more sweetness akin to a good tube amp while retaining all the great grunt, clarity and quickness Krell has always been renowned for. Since 2003 when I purchased the 400cx, this amp and its partnering KCT preamp have steadily been improving over time.
The 400cx is a classic and want's for nothing! If you desire the krell sound and do not need the absolute grunt of the 400cx you might be wise to get a 400xi...all the hallmarks of the bigger cx amps are present plus an excellent preamp stage as well!
Dave_b is right on as I also am using a 400xi in my second system and it has all the great sonic hallmarks of the cx series, in fact I compared it to the KCT/400cx combo for the first day and a half A/Bing it driving Thiel CS6s, a rather difficult load for any amp. The 400xi rocked just fine and extended into the bass almost as well.