> I see. For laymen it's hard to understand: there are many price levels of DPs and even the most expensive ones don't have big enough samples.
Yes, most of the time.
There are some rare exceptions to this, like Korg Kronos 1/2 (more like a music workstation), which has a built in Intel Atom x86 processor and an 30 GB/62 GB internal SSD.
It has full length grand piano samples (with 8/12 velocity layers) without looping, and the piano samples themselves in this rare occasion is in gigabytes :) (~3-4 gigs per piano sample if I recall, which is very rare in DPs)
So it should sound pretty good for a sample based piano. However the piano action on it is... somewhat basic.
Then there's Korg Grandstage (has ~19gig total sample size, I believe it uses the same piano samples as Korg Kronos (Kronos just has a whole lot of other instruments too)).
That taken into account I just focus on getting great action, and then hook it up to PC with low latency audio drivers.
Honestly that Kawai K-300 Aures sounds like a good deal, an actual acoustic piano, as well as optical sensors to read velocity of hammers and get MIDI output.
I'd probably try to get the Kawai K-500 Aures, the slightly taller model if possible.
Yamaha u3/u5 uprights, properly tuned and well looked after, with front and top panels wooden panels removed can sound fantastic.
>I'm not used to acoustics and the ones I encounter are sometimes sluggish or hard to play for me
Usually long-time DP players struggle with pedaling once they hop on a real acoustic.
This is because DPs are generally speaking very forgiving in terms of sustain pedal use - you can kind of be pretty sloppy
with it and just kind of hold it down for extended periods of time with it rarely if ever getting muddy.
That's enabled by most DPs having a very short decay sound, plus each note is kind of thin/narrowband and isolated, with minimal string resonance (compared to a real instrument).
On a real instrument you kind of get audibly punished for being sloppy with pedalling. :)
And it takes takes a bit of time to re-learn proper sustain pedal use on a real acoustic.
Either way, good luck!