Not quite the same, but I have the ReSound Omnias with M&RIE receivers, and I’m quite happy with them. I do have occlusive custom-made ReSound molds with Select-A-Vent, and I choose to fully block my vents - but I could have anything up to a 4 mm vent size with Select-A-Vent. I think the sound is great, but you can get feedback if you’re not careful. The OP does not post his audiogram, but ReSound says M&RIE does not work well with steeply sloping ski slope loss because one part of your frequency range will be highly amplified and the other not. I solve this problem with my occlusive molds. Besides liking the sound, I think, as advertised, the M&RIE receivers give you better spatial sound localization. My audio was willing to let me try the M&RIE receivers and go to standard receivers if they didn’t work out for me. But I paid her $200 for my own custom molds designed to hold the “trial” M&RIE receivers. Don’t know if Costco has a trial policy on receivers, but custom molds through Costco are much cheaper than from an audi. So if you were willing to blow ~$100, maybe Costco would let you try the M&RIE receivers, at least to wear around the store. I’m wondering if a hidden benefit of M&RIE receivers is that since the mic openings are rather hidden a few mm inside the mold openings, whether the M&RIE receivers are less likely to clog from debris from your ears, scalp, and hair. The M&RIE receivers also have “microphone guards/filters,” which can be changed out. So, my theory is that as time passes, the microphone input performance will deteriorate less from accumulated gunk than the unprotected microphones on the HA bodies behind your ear lobes. It seems like HA OEMs should put user-changeable microphone filters on all HA microphones, just like wax guards for the receiver speakers. I’ve changed the M&RIE filters myself, and it’s not much harder than changing wax guards.
I agree with @philbob57, though, if the 20s are imminent, I’d wait and give those a try instead, or at least ask Costco what the possibilities are for trading up. It seems to vary from one Costco location to another.