Hoping to resurrect this thread...
I've been using venue-provided Sennheiser G3's for years. 5 transmitters and 10 receivers, all bought used, and the only repairs have been one pack and a few belt clips. COVID aside, a ton of people have used them an average of two to three times a week.
That said, I'm a wuss about monitor quality. If I had a compressor pedal that sounded as bad as the Sennheiser packs, I'd kick it to the curb. Frequency response is OK, but certainly not audiophile quality.
Also, we've had persistent, intermittent noise artifacts due to interference. Rarely a show-stopper, but always an annoying distraction.
I'm starting to get invitations to play out again now that COVID restrictions are lifting, and I need to get my own set. I'll be using it on stage, so range isn't a big issue.
I rented the Shure PSM300 this weekend, and had mixed feelings. Sound quality is OK, but not as good as the Sennheiser, especially signal to noise. I had to get the gain-staging just right to keep it down to a liveable level, and at a lot of the places I play, I can't count on FOH to get the aux sends right during a short soundcheck.
In comparison to the headphone out on my MOTU audio interface, it sounded like crap, particularly in the lower register with my 5-string.
I've grown spoiled by digital instrument wireless like the Shure GLXD, Line 6, etc. I want that "almost a cable" sound quality for my IEM's as well.
A grand is my upper limit, so the real pro UHF stuff is out.
Xvive looks interesting, but no stereo, and 2.4GHz is very crowded these days.
My search has led me to the MiPro's new digital offerings- the Mi-909 (UHF), or the MI-58 (5.8GHz wi-fi). Apparently, a lot of rental places are using the MI-909's, as well as the older analog 808's.
The MI-58 sounds particularly interesting- twice the channels compared to 2.4GHz wi-fi, less competition for those frequencies, and the audio response is supposedly very close close to 20-20K.