I owned an Outlaw RR2150 (old version)and it was a nice sounding receiver but I am not fully convinced it will be a good match for Zus. My Zus are the Defs, so the Omens will be a bit different.
I tried it with mine and it was a bit too forward sounding for me, but everyone’s preferences are different. I will say this though, both companies will take the time to talk to you about their products and give you their opionions on what they feel will work. I spent countless hours talking to Sean and Garret at Zu and they weren’t pushy at all and even willing to push the trial period out to make sure I was happy. Take your time. Do your research and see if you can find someone locally that will give you a listen.
FWIW, I love my Zus, but I prefer them with tubes. I believe Sean likesthe Peachtree Integrated, which might be found used at the price point you are shooting for but I don’t believe it has a phono preAmp.