I tried to do the same a couple of years ago for example Naim’s all in one series. I listened to the top of the range model at £4k and had two main observations. 1. In direct comparison with the bottom of the range Naim amp and streamer in the same system at the dealer the budget models sounded better on every level. 2. Naim digitise the MM input to stream around the house. They claim no difference to their own phonostages. I didn’t get to hear one but in comparison to my Audion Premier phonostage the Naim sounded compressed and restricted and flat. Is that what a standard Naim MM stage sounds like? I did a home demo and my existing separates were far ahead of the Naim.
I also tried the Nad M10 and some others and ended up buying a Marantz PM7000N. I only kept it for two months. The amp when paired with P3ESRs lacked punch. And the built-in streamer sounded piercing and unnatural when compared to an Auralic Aries Mini through the analaogue input.
Also did a home demo of a Devialet and everything sounded unnatural (this was six years ago).
I ended up staying with separates as the downgrade in quality was just too great. Maybe if you didn’t need an MM input it might be an easier task? Maybe a compact streamer/DAC and a separate amp with MM input would give you decent sound in a compact enough form?
That's interesting and thanks for sharing your experiences - exactly the kind of input that's useful. Whilst I realise your comments were a wider opinion than just the Naim stuff they are not something I'd want to explore to be honest - I have listened to many of them and they are just not my cup of tea.
I used to be a Linn owner, for many years and whilst I was always happy with their sound, their (IMO) massively overpriced products and 'Exakt' stuff just put me right off them. It was in danger of becoming more about the system than music, and that's in no way intended to disrespect/criticise the many good folks on here who happily invest in Linn stuff. That said, their new Selekt and Majik offerings look nice and could possibly be an option as I'd have no intention of succumbing to their marketing of constant upgrades that I see no value in. Again though, they seem overpriced to me.
Another one I am considering but have zero experience with would be the Moon Neo Ace. The reviews are great but a quick trawl through previous posts on here before posting this suggested that their control app is a bit unstable. That's a shame as the unit itself looks really well-engineered and has everything I want.
That said, I am sorely tempted to pre-order the new Yamaha R-N200A. I just need to take a big deep breath about the price of that one too - £3k is a lot.
Finally, to answer your question, yes I could live without the MM feature and use an external stage. It's not ideal as it is another box but if that's the compromise over the right streamer then I'd be happy to concede it as long as the other must-haves were there.