Which one is the best INTEGRATED!!


My system 
Focal speaker
Esoteric source

I am going to buy a new one but I am not sure about them all which one I should buy.

Here is my integrated list
Karan KA I180 MK2
Accuphase E650, 600
Jeff Rowland Con S2
Burmester 082
Pass labs INT250
Audio Research VSi75
Gryphon Diablo300


loreaor
The Belles Virtuoso Integrated. About to be released in March. Cost is at $6500.00. David Belles is a rare genius in high end audio. You will be hard pressed to find any integrated on planet earth at $20K or below that even comes close to Belles. The richest, most musical solid state designs currently in the U.S.A. Will get you closer to the magical quality of 
tubes without the maintenance of tubes more than any other solid state amp. The quality of parts are rare to find anywhere in his designs and his phono boards are absurdly state of the art and sound so good you will never even think about an outboard phono preamp. I recently sold my latest audio system and will be purchasing the Virtuoso this March and will match it up with speakers such as certain SE models from Tekton or the D9 from Spendor, but I am leaning heavily towards Spendor given their reputation and sound quality during the past 40+ years. The D9 is very neutral and sound is towards the lean side and matches up very well with gear on the warm side which Belles is known for. 
Check out the Belles Virtuoso on their site at www.powermodules.com 
Very powerful unit putting out over 200 watts per side into 8 ohms.
American made to the highest standards.
Great choices you've listed. Don't make a choice until you listen to the Accuphase. About 99% of people on this forum have never heard one. I can help guide you on how to get good pricing. 
Accuphase E650:

Output (rms): 150 W/1 Ω | 120 W/2 Ω | 60 W/4 Ω | 30 W/8 Ω
Total Harmonic Distortion
(both channels simultaneously, FR 20-20 000 Hz): 0.03%
IM distortion: 0.01% 
Frequency range (line input and Power In): 
20-20 000 Hz (+0/–0,5 dB), @ full power; 3-150 000 Hz (+0/–3 dB), @ 1 W
Damping factor: 800 (8 Ω)
Tone control: 
BASS: 300 Hz/10 dB (50 Hz) | TREBLE: 3 kHz/10 dB (20 kHz)
Loudness: +6 dB (100 Hz)
S/N (A -weighted:  RCA input: 102 dB | power in: 117 dB
Power consumption: 168 W (idle) | 290 W (max.)
Dimensions (WxHxD): 465x191x428 mm
Weight: 25.3 kg

 Pathos Inpol Heritage:

Type: Reference stereo integrated
Amplifier: Pure class A
Technology: double INPOL fully bal
Tubes: ECC803S tung-sol, 6H30 Sovtek
Output power: 2 x 80W @8 Ohm
Freq response: 2Hz–200KHz ±0.5db
Max input voltage: 10VRMS
Input sensitivity: 780mVRMS
Input impedance: 20KOhm
Vol regulate: purely resistive relays
THD: 0.1% @ 80W, SNR > 100dB
Gain: 33dB Unbal, 39dB Balanced

Analog In: 2 bal XRL, 4 unbal RCA
(HiDac required for below inputs)
USB: USB port type “B”
SPDIF: coaxial, Optical
Ethernet: RJ45
USB: 3x port type “A”
Preout: Stereo Unbal RCA, Bal XLR
Gain: selectable in 4 positions
Headphone: 6.3mm jack connector

Dimensions (DWH): 555 x 450 x 230mm
Net Weight: 58Kg