I will agree with bradh... I was brought in to do two solo piano recordings for a local Steinway artist about 5 years ago (I'd recorded her live two or three times with orchestra, but that's another story...) and, as her beloved Steinway D (named "Elliott") lives in her home (with an unusually wide and long living room), and as she wanted to be able to record at will (over what became two years of tracking) we decided upon the MixPre6 as a machine she could easily learn for starts, stops, etc, at will. About 18 months in, she asked if I could begin the edit phase. We had, over a week or so, auditioned a half dozen pairs (DPA, Sennheiser, Neumann, Gefell, Sony, and Line Audio) with immediate feedback, as well as "living" with the results. She was torn over two pairs... MKH8040 and Gefell M296. She couldn't choose between them. so... she ordered a pair of each, and I installed them in the "A/B" positions we'd decided upon early on to capture "Elliott's" voice. Then she got serious about recording her repertoire of Grieg and Mussorgsky solo piano. As one card would fill up, she would change it out and insert another.
As part of my "deal" I loaned her my secondary nearfields, a pair of minty HHB Circle 5s, powered by a 85w/ch receiver amplifier. I collated the takes, in order, on her MacBook Pro (running Logic ProX, the same as I used) and she began putting her sets in order. Once she was happy with the takes and the ordering of them, we began a long series of editing sessions... once those were finished, we went back in for volume edits and polishing. While not a "major label" release in any way, we both were pleased that we had lovely performances of her piano in her room, just as she (and her conductor husband) wanted them to sound. And I thought they sounded dam'fine!
The Gefells (which she chose over the MKH8040 and several "blend" mixes) were the "winner", and, having sat in that room, listening, for hours early on, I had to agree. Gefell M296 were the right choice... as was a recorder with onboard mic-amps that not only didn't mess with the sound... but had the precision for hearing nuances that most folks wouldn't hear, or recognize.
Bottom line... I'd love to have a MixPre6 in my kit... and if I have opportunity for a project where that recording format is necessary, I'd buy another one in a New York Second.
The photo was a "final shootout" between Gefell M296, MKH8040, and DPA4061. I was recording to a borrowed MixPre6, one pair at a time, for her to audition for the "final" choice.