I've owned both the Ack! and Muse2. I finally sold the Muse2 after many years of faithful service and bought a MF A324. I sold the MF A324 after hearing the Ack! I use a Theta transport. The Ack! beats both the the Muse and MF in my all tube system. The Ack! makes serious music. It's the lowest cost component in my system, by far. If you listen to alot of vinyl, the Ack! will fit nicely in your system.
