Here is why there is all the debate- First off, the more open the ear, the less gain, especially in the low frequencies, you can get. With your loss, you need more gain in the lows than is typically available with a standard open fitting.
If we had a way to close the canal more and still fit a “open” hearing aid, like some of those mentioned above, it is possible that one would work for you. The “closing” options would be to have a custom tip made or use a power dome. Even with one of those options, I would put you in a borderline candidacy for this type of device. It might work for you today if the fit was very good. Unfortunately, if your hearing changed signficantly, you might fall outside of the range (same for a CIC) then you would have to consider buying another aid. This doesn’t mean that a well-fit open device or CIC might not help you. It just means you are at the limit, and I’d use caution before I invested $5000 in something that might not be enough in a year or two.
There are other options: Some aids can be fit both open with the slim tube and with a traditional BTE mold. I’ve fit ReSounds (Azures and Pixels) this way as well as Phonak Savias and Extras. You can start with the small tube and then later, if you need more power, you don’t have to buy a new hearing aids, just a new mold. This is usually what I do with the borderline candidate with losses like yours that really want to go with the open-style tubes.
Hope this helps!