Lots of great options in the price range. My best advice, based on my experience, would be to go with separate dac and streamer.
If you are going with Roon I recommend and Dac that has Roon incorporated. For my first two iterations I went with I had a Roon Nucleus + with a Lumin D2 and decided I like it and upgraded my streamer to a Lumin T2. I am really impressed with the Lumin technology, value and sound.
I decided to overhaul my system and demoed everything I could get my hands on and landed on a Grimm MU1 Streamer with Roon built in and a Nagra Tube Dac. I demoed Aurender, MSB, NAD, Innuos, Lumin, on and on. If I did not get the Nagra I would have gone with the MSB. The Msb Discrete Dac is probably in your range and agree with @riie . Again, my best advice is to go with separates.
Let us know how you make out.