Good reasoning here! However, the effectiveness of this may depend on your actual hearing loss. Feel free to send it to me in a message. The real truth is that even the lowest level of of the technology of a particular product line can give benefit. But the problem comes in the flexibility of programming. There is a lot of difference between the 5 and 9 in terms of the detail of fine tuning. The bells and whistles are great and may not be the sole reason to justify spending more, but what you get in the details of programming can make a huge difference. Also the thing to consider, which really is the biggest component, is the Analog/digital conversion and the digital/analog conversion. You will be getting the top of the available resolution with the higher end models.