I started with the original Bartok on home loan Jan 2021, we liked it more than the Auralic G2 Aries/Vega combo, enough that they were sold and the Bartok took up residence. The Auralic had beaten everything else we'd tried up to then, only reason for looking elsewhere was that the Leo GX clock & Sirius were busts so the plan for the G2 stack of 4 units being end game failed- the Leo clock made absolutely sweet fa difference. Lent it to a mate with same gear as us, he found same - no difference.
Couple of years passed and then I borrowed a Bartok Apex to do a head to head, my Bartok was at V2.0 by then. Definate improvemnet but not large enough for me to hand over the wonga, decided a used Rossini non Apex was the way to go and some patience.
Shortly after that I was able to home demo a Rossini and a Rossini Apex over a reasonabale period of time, decided the Rossini Apex was what I really wanted to move to - significant improvement accross the board. Struck a deal and came home a few months ago with a brand new Rossini Apex and a used Rossini Clock that was handed back as a trade in the day I was collecting my kit - half price - figured if I didn't hear a difference like with the Leo I'd move it on easily enough. I actually made a £Grand selling the Leo on. The dCS Clock does make a small but noticable difference, I did the usual litmus test and after taking it out of the system I missed it, so it's still here.
Long term I aim to get a Vivaldi + Upsampler for a home demo after a shop demo to see if worth the hassle. My dealer is good and doesnt charge for shipping loaners, well not so far.
dCS is expensive but if you buy carefully it does hold it's value and you're unlikley to take a bath. I'd aim at the Rossini and see if you can get a deal, I got a great discount on mine - there are a lot of Bartoks around used seem to be about £10K from dealers, private you should get one for £7-8K non Apex. Might be some announcements at Munich - likely software I think not hardware.
Thoroughly pleased with the Bartok and Rossini, to my ears they are the best streamimg/dacs I've heard at their price points, if I didn't have umpteen TTs I'd be more than happy with the Roissini as my Pre also. The dCS forum is worth joining, lots of info and a few real enthusiasts post - plus some fab system pics.
ATB
Gus