I had an Aesthetix Calypso/Rhea, which is a Janus in two boxes, more or less.
While the Aesthetix has plenty of gain for low output cartridges, I always thought it was a bit noisy from the all tube gain for the phono. You should see if you can try it, before you buy it. The Janus might be great for you.
Now using a Luxman CL-38uC preamp. I think it sounds great. It is single ended, except for the CD input which has a balanced option. It had two SUT built in so plenty of gain for low output MC, and it is very quiet.
YMMV, this is just my experience.