Integrated that blew you away

Integrated that blew me away was not sound because I am in the camp that subscribe to the notion that a competently designed amp shouldn't impart any audible changes to the tonal identity of the speaker/room frequency response balance; but let us table that discussion.

What impressed me about the Integrated was how seamless the app systems, I/O abundance and how it fit my personal aesthetics. It is the MA12000 2-Channel Hybrid Integrated Amplifier from McIntosh @gochurchgo 

It's all personal preference,  and we usually recommend what we have owned.   I'll be no different in sugesting the Hegel H590, now the H600. IMHO,  a terrific integrated.  It ticks all the boxes from good power to very good DAC.  I just didn't find it came up short in any area.  Cheers.

I've always been a separates guy but my second system has an integrated amp.  It sounds great, I'm pretty confident I could have spent more on budget separates and still not have gotten the same performance.   That amp is a Cyrus i7XR.   Way too small for your needs but it's a great example of how good an integrated amp can sound.  

My Dad has the McIntosh MA8950.   That is a seriously good amp.  The built in DAC sounds excellent.  He has it driving a pair of Sonus Faber Electa Amator III anda REL S/510.      It's a great amp. .

Moon/ SimAudio makes great integrated amps too.   

Definitely want to home demo amps in that price range if possible.   

My favorite integrated is the Synthesis Audio A 40 (40 wpc KT -66 tube) or their A 100 amp (100 wpc KT-66).  Both have built in DACs that are good and remove control.  The only major negative, to me, is a lack of balance control.  I hang out at an audio shop and I get to see how shocked some people are with the sound of these amps.  Most who take these home for a trial end up buying.