I am a satisfied Atom user myself. But for vinyl (MM), the new Nait50 would certainly be better in the price range (if it’s still available, it’s a limited edition). The Nait50 has extremely good reviews here in the forum (Click here)..There is also a special thread on streamers that fit the Nait50 (Click here). Not only does the Atom not have a phono stage, it also converts analogue signals first to digital and then back to analogue via internal dac. Vinyl is not the primary source for the Atom.
And for speakers there are many suggestions and recommendations here in the forum too (you find them easily by search function). I use Vienna Acoustics Haydn and they fit very well, PMC 5.21i are also common here. But I would recommend to listen at some speakers at your dealer and if possible in our home. There are many differences between the manufacturers and many dependencies on the space in which they are used, with speaker positioning etc. Trust your ears and enjoy.