I’m looking into another amp too and the V550 is on my short list. While lurking through other forums and threads I’ve been keying in on signatures that show off the users chain, or I flat out ask them - What DAC they are using and what they like about that setup. From what I’ve gathered is it is Hugo 2, Bifrost 2, Yggy, Holo Spring, Ares II, Pontus II & Venus II, and as @Hazi59 stated, the Soekris DAC’s, that all retail in the the same MSRP (including tax shipping) of the Yggy AKA $3K or less, that get a nod.
I think though more importantly your choice should come down to what signature you are after/prefer and the headphones you will be using and then choosing a DAC that has qualities to compliment the amp and the rest of your setup.
I currently run a V281 with a Soekris dac1541 and I personally like that combo. The V550 is not quite as warm leaning as the V281 (disclaimer I have not yet heard a V550) so that synergy could change a bit when paired with a V550. Though I’ve heard the 2541 works OK, but again its what qualities you are looking for that matter.
What DAC are you working now? Perhaps if you have settled on the amplifier - pick it up, run it with your current setup for a while and then decide which way you want to go, based on what you are hearing.
I’m doing it all backwards - I’ve placed an order for a new DAC and will be attempting to match an amp… I think that is much harder to do considering limited options for amps within my budget. But that’s another story for another time.