VAC 160i SE vs Audio Research GSi75

VAC is a great company and sounds more musical than ARC.

I’d go Vac between those 2. Great company, better built and a much fuller sound then Arc.
If I could afford one I’d buy that exact integrated. 
The lumin is also fantastic. I can’t comment on your speakers because I haven’t heard them. 
I’d bet that vac would sound very good with any of them. Good luck and congrats. 

I used to own vac integrated great amp if its enuf power ....alas was not enuf for my harbeth 40.2 for all my music listening but for much of it was sublime 

I owned both amps albeit with several years in between and the systems were in 2 different homes, different speakers, sources, wire, etc. With that caveat, they are both terrific but very different. The Vac, built like a tank, exceptional company and amazing support. The GSI75, same thing. Both had fine phono stages although I never used the one in the GSI75, it had variable cartridge loading, etc the VAC’s stage was tubed, the ARC was not. The DAC inside the GSI75 was terrific, a very fine dac. The VAC, of course, had no dac and had a few more options at order time like balanced ins, etc.

The sound of the VAC was very smooth, a very traditional and nuanced amplifier. The ARC was more dynamic, authoritative and transparent but I certainly wouldn’t characterize it as traditional or tubey sounding. Textured and transparent yes, tubey, nope.

if they were priced the same and I were in the market today, and as much as I deeply respect Kevin Hayes of VAC, it would be no contest, the GSI75 is a superior amplifier. Lets keep in mind they were developed years apart, the ARC being newer and the VAC being an evolution. YMMV

Thanks everyone for the replies. I'm leaning towards VAC however ghasley raises some valid points. Anyone else who has recent experience with these two amps is encouraged to chime in.
Cheers!