fooloof,
Maybe it's already been said in multiple ways, but I think this is what you're fighting, and you have to approach it a different way:
You have the Voyager, but you're not really getting sound out of it that inspires you, the way you imagine -- since you don't have an ancient Minimoog -- an ancient Minimoog might.
You fear that you may spend lots of time on the Voyager, and STILL not get anything inspiring out of it. You continue to think there's this sound you'll love that an ancient Minimoog makes, that is what you really want.
That's entirely possible, and none of us can tell you one way or the other what will happen, over time. Might be you learn your Voyager and smack your forehead over why you ever wanted all the trouble that goes with learning and maintaining an ancient Minimoog. Might be you regret wasting all that time, finally sell off the Voyager for an ancient Minimoog and wonder why you didn't do it sooner.
There's really only two ways to solve this problem:
a) Take the chances with your Voyager, spend two years mastering it (any less time really isn't a concerted effort, believe me), and if you still don't get what you want out of it.... sell it and move on.
b) Get rid of the Voyager right now, get a used Mini in hopefully good working condition, calibrated etc., and then spend those two years with it.
There's a third, more expensive choice: get both, and spend time using your ears to see which one really gets you what you want, musically. Get rid of the one that doesn't, or maybe at the end of that trip, you'll decide that the thousands of dollars it cost to get both was well worth it, and you're not getting rid of either. You're a pilot, you already have one expensive hobby (unless it's your job?), so you're familiar with racking up the bills on fun already (maybe).
But the bottom line is, and I'll tell you this from years of experience: do NOT be seduced by the internet. Do NOT be seduced by marketing of technical features. Because there are lots of different tech specs all of which may be functionally useful depending on specific technical goals you might have, but NONE of them tell you about the sound. Youtube does not tell you about the sound. All of us laggards online here do not tell you about the sound. Only your ears will bring you to the right decisions, for you, and ultimately, after that, nothing else matters. What sounds good to you, regardless of price, specs, reputation, status factors or whatever, is what I think you ultimately want. No-one can decide that for you, and it's all too easy to be distracted from that by others' profuse opinions.
All that said, I'll say one other thing: lots of good comments on this thread, even from the more irascible ones, but above all, trust Yoozer and TheRealMC. I've seen these guys online for over a decade, they've been a constant resource that whole time, both have immense, extensive both musical and technical experience and expertise, have been closely involved with both electronic music and the musical instrument industry. Don't really know as many details about Yoozer, but TheRealMC I know has been very close to some of the best analysis of the foundations of what makes "analogue" sound great there is available online. He was involved with development of the Andromeda. He's created definitive studies of what makes a Moog sound like a Moog, which he's generously shared.
So if you have to listen to anything beyond your ears.... listen to those two guys, above all. They've been "right," in my opinion, on _all_ this stuff for a very long time, more than anyone else on the internet.
Oh! One last thing: a lot of what a lot of us consider "wonderful sound" when we hear it online, or more preferably, on a CD with uncompressed non-MP3 sound on it, or live, is the result not only of a particular instrument, but of the effects on it, the reverb, the room sound, the way it was mixed in a track, the way it was "sweetened" with innumerable sweetening techniques that are legion in the professional recording industry and... above all... the mastery of the musician, as well as the engineer of the mix, behind the machine.
Don't be surprised if your raw encounter with that lonely little instrument outside of all that doesn't sound the way you thought it would, based on your hearing it in the context of everything above. If you want to get "that" sound, you'll need all of the above, as well.