@drbond, what a difficult, yet fun decision. I happen to own a full Ypsilon and FM Acoustics systems and they are both awesome. Both systems are "buy and forget" as you focus on enjoying music and nothing else. The Ypsilon Phono requires SUTs for MC, and in my case I have 2 from Ypsilon to cover the cartridges I use. The FM has switches and modules with various resistance values (FM122, in my case), instead. Obviously, the FMA 223 mentioned above is at a higher level than mine. I have selected not to mix the two systems, as they both perform the best when matched with their in-house components. Another phono that I considered seriously prior to deciding on the Ypsilon was the Zanden Model 1200mk3. The TTs I use are Helix 2 with Ikeda arm, Thales Compact II with Simplicity II arm, and Simon Yorke S4 and S10 with their "house" S7 and Aero arms, respectively. Cartridges used are VDH Frog, multiple top IKEDA, Lyra Skala, Transfiguration Orpheus, Shelter 901III, various EMT, Grado MM Reference and Ortofon A90. All contribute to sonic diversity and fun, as well as to prove to friends that choice of cartridge can totally transform a system, up or down!
I do not know where you live, but now with the "show season" in full swing, you maybe be able to convince distributors to bring their phono to your home for a trial. There is no other better or safer way to make the decision.
Unfortunately, I haven't auditioned the Manley or the EM/IA, thus no comparative notes there.
Good luck!