I'm not a pianist but I LOVE pianos, worked for a few weeks in a music store bazillion years ago where we had in the upper floor a large hall with many pianos. the king there - on its own little stage - was this majestic grand white Yamaha C7... which no one in the store was allowed to touch... specifically(!!!) not the guys with the long hair that demo and sell those "hideous" pointy and noisy electric guitars and distortion pedals (read METAL ZONE!!!) all day
Well, every time I had the opportunity, as in store managers went home early, I was running upstairs to that Yamaha, playing on it just soft chords and watching and feeling how my body, the other pianos in the hall... and the whole damn floor... all resonate together "on command"... almost like "God has spoken" lol
Well that's how I remember things... and no I wasn't doing drugs... well... not that I remember
OK, so from the pianos I own and those I have access in a studio, the best 2 (in that order) for my ears are:
Hammersmith for stainway - I don't care if some sample here or there is not perfect, or if real pianists think the pedal behavior is not perfect?... but man... some of the mics there give an amazing sound with TONS of resonance... it just gives the illusion that you play a "live" piano... it has soul
The space (Mark Knofler's own insane studio), the mics, the mics positions, that's as good as it can be.
Pearl Concert Grand for Yamaha - amazing how with just 8 layers it sound that good. a bit of eq boost at around 60Hz and it sounds massive, like a grand should be!
With just 8 layers and ONLY 12GB (at 16bit), I think ISW should get some music tech industry prize, cause the Pearl puts to shame other libs with x10 the sample pool.
Here are some pianos that are regarded and disappointed me:
Garritan CFX (too noisy, too spiky, a bit too much room, couldn't eq it enough to get a soul out of it) <- and its like 100GB?!
Embertone Walker (35GB per microphone, and for me, none of them sound good) <- didn't try to eq it, with 150GB sample base it should be perfect out of the box.
Noire (something in the layers is off, top layers have way to much gap and bottom layers are just masked with an aggressive dynamic low shelf that you can't disable or tune out enough. its like an auto wah pedal, why???)
Pianoteq (no thanks! the high registers are ok, i'll give it that, but as you go down? sound at the low end gets more and more like lifeless rubber. really who cares that it **technically** plays the best, when the sound is like that)
Honestly? with some tasteful eq and instrument tweaks, even the other NI pianos (Gentleman, Giant, Granduer, Maveric) are nicer than all those "regarded".
Cheers