Analog to Digital converter

I recently bought a pair of Devialet Silver phantoms and am keen on adding a turntable and a reflex M to try out vinyl sound.

My speakers are set up to receive the optical out from my tv so its also my home theatre system.

the output from the phono stage is analog.. so i'll need a 

1. analog to digital converter..

2. and a splitter of sorts to receive 2 optical inputs from preamp and tv.. to go into my speaker.

what would you guys recommend for both? i'm concerned about quality loss.. 

for my turntable, i'm thinking about a P******t x1 or x2 and perhaps a sumiko moonstone?

Now, trying to integrate vinyl with these speakers is going to pose a challenge. You need to find an A/D converter that has RCA *inputs* with an optical *output*. Most of the professional A/D converters I have seen don't work like that. Typically the inputs are 1/4'' jack or XLR and the outputs will be XLR, USB, and/or Lightning port usually. Perhaps I'm wrong and something exists for you, but it would not be very common at all. 

Cheaper, consumer level A/D converter products typically have RCA inputs but a coax digital output jack. If you can find a switch box that lets you convert the coax output to optical input for the speakers, then you probably could get things to work as you describe. Your system would look like this:

TT>preamp out>A/D converter>coax out to optical switchbox>optical out to powered speaker. 

You would also plug the TV into the switchbox via optical. 

I don't have an specific recommendations for products sorry. A lot of the cheaper A/D converters seem to come from the same factories with different brand names slapped on them. Same deal with switchboxes. You might have to try a few to see which one works best for you. 

Personally, if the goal was for me to play vinyl I would put together a separate, analog-centric stereo system to use for that. I realize if you just spent $$$ on these wirelesss speakers you might not want to do that. 

RE: your proposed turntable, I can't say I'm a fan of P******t products in general and especially not their entry level TTs. That said, these are new models, so not a lot of long term reviews out and I haven't seen or handled them. Perhaps they've improved over the old entry level Project stuff. I do not know. RE: the newer Sumiko cartridges, a German magazine called Lowbeats did extensive testing on the entire range. That might be worth reading (easy to translate via Google translate) if you are interested in those cartridges. 

Good luck. 

technically, it wouldn't be too hard to do? and could attract a whole generation of users like me who do have a digital system and won't have separate setups for everything.