Best integrated/power amplifier under $6000

I just sold the Rega osiris integrated amplifier,  just sold the Luxman L-509X integrated amplifier,  just got the Krell k 300I integrated amplifier,  the Krell is a lot better than both with only 300 hrs of break in,  still getting better,  to me Luxman sxxxx!, hi fi sounding to say the least,  treble is exaggerated,  and is un realistically  to resessed in the sound stage! 

yyzsantabarbara, the Luxman L-509X integrated amplifier did not ever sound different from new out the box to 600 hrs, the Krell continues to get better from new to  300hrs and continues burn in , the Krell kills  the Luxman with uncanny clarity,  mid range,  sound stage size and depth, bass, and does not distort at loud volumes as the Luxman gave out at large volumes with distortion,  the k 300I best suit is clarity without losing musicality,  and the sound is not warm, rather in between warm and cold, the other mention here is I don't get listener fatigue with the Krell like I do with Luxman,  the Rega osiris was a nice sound but didn't have the treble detail or the clarity as the Krell, however,  the Rega sounded better than the Luxman,  reget selling the Rega,  didn't need two integrateds, cheers. 

audiotroy, I did not get the Krell with the digital board, I have a digital board in the ps audio direct stream memory dac and matching transport with up graded snow mass soft ware, the Krell and everything else  has dedicated lines with furutech gtx-Rhodium d outlets, and $8,000.00 a cord Tara Lab's cobalt reference power  cord's ,  all mated with Tara Lab's muse speaker cable's and balanced  interconnect's,  with magico q3 speaker's,  also jbl L1 book shelf speaker's,  I switch back and forth between the speaker's .