Hi David!
ReSound has a three-part model designation for their wireless hearing aids:
First, is the model series (Linx 3D, Linx², Verso, SMART 3D,…)
Second, is the level of technology in the first of the three digits, which determines the price: 5xx is basic, 7xx is intermediate, and 9xx is premium;
Third, is the chassis, designated by the 2nd & 3rd digits, and generally involves almost nothing with pricing (except for custom). For example, x62 is the #13 RIC, x77 is the #13 BTE, x88 is the power #13 BTE, and x98 is the #675-fueled instrument you want, for robust, non-stop streaming.
As I mentioned above, I fit even moderate losses with the x98 platform, and their satisfaction is the highest, as battery life is great, even when streaming music all day at work and/or tinnitus masking from an iPhone app.
Basically, you’ll want the Enzo 3D 598, 798, or 998; and if cosmetics are somewhat important, you can substitute the thin tube for the standard #13 earmold tubing.