Solutions for converting vinyl to 256 DSD?

one thing i will add is that vinyl ripped files will display some smoothing and blunting to dynamics which can be pleasing and desired in some systems. so the more neutral tape transfer streaming files might not be preferred in particular systems. which some can interpret as ’vinyl-like’. not how i see it, which is why i prefer tape transfers.

or maybe you have a dac that you like that is better with dsd than PCM. especially some older dacs did not do a good job with PCM. newer dacs with newer chip sets have moved past nasty PCM mostly.

so for sure matters of taste and synergy are part of the picture.

Ayre produced an ADC for the purpose a while ago. The founder was convinced everyone was going to be converting their vinyl. They put a huge amount of money into its development. It was a flop. Could be exactly what you want. 

I just finished listening to the 1958 Mercury recording of Saint-Saens: Symphony No. 3 conducted by Paul Paray in 24bit 96kHz on Qobuz. It brought tears to my eyes and shivers to my arms. I noticed Paul has a couple dozen Mercury albums in the 1957 - 61 window. 

I suspect more and more old recordings will be added to streaming over time as the masters or good copies are found. 

The other issue I see is the "MetaData"...  Steaming services have these all set up.  

I suspect that the OP $ will be better spent buying second copies of the LPs that wishes to back up 

@OP. The choice in DSD ADCs is pretty limited. The Tascam DA-3000 could fit the bill. But you would need to A/B it against something like one of the two channel RME ADI Pro interfaces. If you are doing the conversion yourself, you might be surprised at the quality of a 24/96 recording. In terms of recording - as opposed to reproduction - the quality of the converters is more important than the encoding system