I would do the Belles which you know matches beautifully to the Vandys and then do an Oppo Sonica DAC which is a very simple and easy to use way to get Tidal into the Belles for not a lot of money.......any internal solution will be very compromised in one area or another......
As to phono, don’t settle for an integrated solution.......there are so many great used phono stages on GON that have a very small form factor......try for a Lehmann Cube or a PS Audio.....it all depends on your cartridge.....but you can do that when the time comes......for now I’d say go with the Integrated that you KNOW has synergy with the Vandersteens and go with something you know has an excellent DAC to get Tidal into the Belles......add a companion Oppo disc spinner later......
Another great option at less cost would be the Auralic Aries Mini streamer.......which includes a DAC and a great app......It is available new for 499.....