Dr. Cliff, AUD, in his YouTube videos, repeatedly advises users to go with the highest technology level they can reasonably afford. If you buy through a reputable online service like TruHearing.com6, you can get several thousand dollars off the price a full-service audi might charge. TruHearing comes with one year of fitting service, but after that, you’d have to pay a la carte for fitting adjustments. My own audi has handled all warranty issues I had on my previous aids at no charge to me (she says ReSound reimburses her for warranty issues). One of the reasons I got my Omnias is I could use disposable batteries. That alleviated post-warranty period worries about how a rechargeable version would last into the future. I went for the size 13s.