I’d suggets Void. It has Ardour in the repo (not Reaper though) and PiperWire with JACK should work out of the box. If you want Reaper, you’d have to install it manually though. I’m working on a template for Reaper, but it’s not finished yet. If you’re willing to wait a month or so, you’ll probably have Reaper in xbps-src as well.