Since it's been available for audition and purchase in the UK for some time now, I'm surprised impressions haven't started coming in.
So basically, you're saying that it's not difficult for a speaker system to get as loud as an orchestra, but we can't get it to sound as good. Quantity vs quality. That should go without saying. I've performed in orchestras and so on and have all sorts of experience as a musician. I don't think audio equipment will ever be able to fully replicate the experience of live sound, though some people may not always notice the difference. But yes, the right equipment can certainly get you closer.
This. The music you love is what's important; far more so than the quality of the recording. Check out my quotes later in this post.
You can find a used Mojo for under $400 nowadays. I owned it twice.
Hmm. Sounds like you should try a Chord DAC.
To my (and countless others') ears, they make all music sound better.
They do far more than just upsampling. Software can be programmed to do extreme upsampling, but it won't sound nearly as good as a Chord DAC and won't do even a fraction of all the things they can. (This has been covered before, but for those whose goal is fidelity, software upsampling should be avoided with Chord DACs because it interferes with their advanced digital processing and results in lower fidelity sound.)
How all this works gets very technical. You can learn a lot by reading
@Rob Watts' posts.
Without going into detail, you get accuracy that is orders of magnitude greater than other DACs when it comes to timing precision and noise shaping, along with zero noise floor modulation and jitter (which, as far as I know, has never been achieved with non-Chord DACs), ultra-low distortion and output impedance, high dynamic range, and more transparent analog circuitry.
Just because a recording isn't perfect doesn't mean the DAC can't get you closer to reproducing the original analog waveform and give you better sound.
This is a great point. Sometimes we are indeed listening to flaws in a recording rather than flaws in our systems...but not all the time. It's well-known that higher fidelity audio gear can improve what we hear. The factors I explained above combine to give you a more faithful reproduction of recordings, and sometimes they are higher quality than you may have thought.
As for the music itself, I would like to share some relevant quotes:
What's interesting is that, although it is difficult to tell things apart on that link (which I've visited before), it's incredibly easy for me to hear the difference between actual 128 kbps (or even higher) MP3s and lossless, even when I convert them myself with high quality software. Low bit rate lossy files sound downright awful in comparison in my experience. I'm not sure how they got 128 kbps to sound so good on that link. But come to think of it, I don't see any mention of the bit rate there, so it could be 360 kbps or something.
Different recordings are different music, so...