@markmuse Funny you should ask. My CODA 07x preamp was great with the Voyager. Read up on the CODA 07x. It is a slightly warm and tube fans love it. I am an SS fan but I really like it too.
I am debating selling my complete Livingroom system (which includes the CODA 07x) to buy the active KEF LS60 speaker. I would not need any other gear with this. If I keep that system I would need to get more gear to finish it off, KEF Blade2 or REF 1 speaker, DAC, additional Benchmark AHB2 amp.
I also tried the $799 Topping pre90 preamp with the Voyager and it had volume issues. The Benchmark LA4 (my keeper preamp) sounds like the pre90 but does not have the volume issues of the pre90. However, with the Voyager it maybe too much of a good thing for some folks. Too much detail and maybe too sterile a sound.
I had sold my Voyager before I owned the Schitt Freya+ preamp. That preamp will likely be very good with the Voyager. I say that because I really liked the Benchmark AHB2 | Freya+ | RAAL SR1a headphones. The AHB2 and Voyager (modded) sound very similar. The CODA 07x is better than the Freya+ but it costs more.