I have an STR Preamp and am getting a streamer as well.
As someone that relies on Anthem Room Correction and bass management, I don’t want a unit with a DAC since the Anthem DAC is required to use ARC.
Are you looking for analog XLR inputs from a streamer or as I assume, wanting to use the AES/EBU digital audio input? The STR USB DAC has the highest specifications but I’m sure the AES/EBU input would work and sound great.
My STR Preamp has some differences with the STR Integrated but they are close. I ended up ordering an Innuos Stream1 with the PheonixUSB module. Innuos recommends USB as the best connection but I don’t think I would notice a difference. There is an optional SPDIF board with AES/EBU, Coax and optical outputs.
I liked the option to install my own M.2 SSD. I am going with 4TB but it will support 8TB. Now the wait for delivery that may take awhile.