@chakster - you are right that everything is subjective and that I can't rely on other people. I am not. I am simply trying to narrow down the many choices that you note are available. This forum has already helped in several ways. It has provided feedback from people who use and presumably prefer Ayre Acoustics equipment, like most of what I own (pre-amp, CD player and DAC). I value their impressions of the many phono stages they've owned or auditioned, since I have to assume they like the Ayre "house sound" as I do.
As someone who has not owned multiple phono stages, I have gotten some sense of the units that may be disappointing in the level of noise or detail compared to others. That is useful in trying to narrow things down to say three options to audition. With the number of decent audio dealers dwindling and with fewer still offering phono stages of any quality, I am likely going to have to purchase from an out-of-town dealer with a return policy, find a friend or acquaintance who will loan me his or her unit to try at home (I've already arranged that for the Ayre P-5xe), or take a risk on a pre-owned unit that is widely recommended (which I hesitate to do) or from a manufacturer with a "house sound" I like (e.g. the Linn Euphorik).
Finally, I've gotten confirmation that my cartridge is also likely part of the sound quality deficit I'm experiencing and I have found two reasonable options that I will try to audition in home before purchasing the phono stage, to see if one jumps out at me.
Your comments are true with respect to the purchase of any piece of audio equipment - pre-amp, amp, speakers, DAC, phono cartridge, etc. There are too many choices to listen to them all. And I may not like the same thing that others do. But the whole point of anyone asking questions on this forum is to gain input that may help them to narrow the field as best they can. That is a better option than just going to one or two local dealers who will try to sell you the lines they represent or relying solely on trade magazines that accept advertising from the manufacturers and who audition the products on equipment that bears no resemblance to what you own or like.