Like to self program and experiment, 2 Programmers, NoahLink and Noahlink Wireless, 3 sets of modern HAs:

Oticon OPN-1

Oticon OPN-S1-Rechargeable

Signia Pure 7NX Charge & Go

So far I am liking the ability of the Signias' to remove background noise, while the OPNs both allow good speech understanding, I like the noise removal of the Signia a bit better.

With the OPN-1 Feedback is an issue at higher volumes, the Signias' exhibit minimal feedback, and the OPN-S is the best at reducing feedback.