That’s a nice rig you’ve got. And those are 2 of the top phono stages I’d be looking at for your Benz Ruby Z, which doesn’t work well with Step-Up Transformers. I had a Herron 2A and it should do very well for your Ruby, but mine went out the door right before I got a Benz LPS in, whoops!
I also had a Reference 6 preamp and the ARC Reference series really really impressed me. If I were you I’d be highly tempted to go for the ARC if it’s either the 2SE, or a particularly sweet deal on a 2.
The only weird thing about the ARC is that its high gain is VERY HIGH if you run XLR outputs - 74dB. That’s a bit on the high side for the 0.35 mV Benz, but should be OK. Or you can run it SE. The Herron’s gain is perfectly suited to the Benz, but SE only.