[The Bard Rocks]

Buying and immediately returning is something that kind of grates on me UNLESS the folks at GC understand your intentions and are OK with it. Another possible alternative would be to rent one for the day. Or talk with the audiologist beforehand and see what they think about just using the McPherson; would it do as well?

From the tenor of your note, it sounds as if what you really want is to buy one to keep. That's very different. The issues of humidifying, affording and storing it are ones only you can answer. To me, I'd be concerned that if I bought it beforehand, then my aids were adjusted, would I like the sound as well? I suppose, assuming you buy from GC or some place with a similar return policy, if that happened you could trade it back for another that you like the sound of better once your new aids were adjusted.