I have a MK II with a HR-100 arm also.
Awesome arm huh??
I have had a Musical Fidelity X-LP,The Rotel(cant remember the #) a Black Cube and the phono stage in my old Rogue 99 w/Telefunkens.
I decided to go with a low output moving coil and I now have a Creek OBH-9SE.It ha 65 dB of gain and has a rather large and heavy outboard power supply.
I would add the Creek to your short list for sure.
They retail for just under $400 but can be had for half that used.
I got a low hour MINT unit for $120 shipped!
This phono stage is built very well,stays on 24/7 for instant full performance and sounds very smooth and musical.The green light is cool too!