Hi Raul,
I have not had the good fortune to be able to audition or hear any of the phono preamps that you mention (FM Acoustics is represented by a local dealer that I do not purchase from; ASR nor darTZeel have local dealer representation, that I am aware of). Nor do any of my local audio friends own either of the three. But, of the phono preamps that I have heard, some of which cost up to 2 to 2.5 times more than the PH5, I can tell you that the PH5 is a worthy contender. A great bang for the buck. Now does it compete with an Aesthetix IO Signature MK2 Phono Stage w/ volume control (like Albert Porter owns, almost $12k retail), the best phono preamp that I have ever heard? Absolutely not. But, with the price differential, I never expected it to do so.
The point in all of this, to answer Jeff's original question: I have heard the PH5 with a Lyra Helikon (on several occasions) and it is not overkill to use this phono preamp with this particular cartridge. Or with the Lyra Argo, for that matter.
Sorry I missed you during your most recent travels to Texas. Maybe next time? And you are correct ... enjoy the music! :-)