I'm considering either the CLRdsp or the Xiegu GBR-1, which is a newer version, but fewer reviews. They are both about the same price.
I Googled and just watched the YouTube video from Waters and Stanton demonstrating the Xiegu GNR-1. Having extensively been using the CLRdsp, I can offer you my opinion, not wanting to sway you one way or the other

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Ergonomically, the GNR-1 has smaller control knobs...might be difficult if you have chunky fingers. Their NR knob is the same as the FILTER knob on the CLRdsp. The L and H bandpass knobs can be somewhat similar to the CLRdsp one TONE control, although maybe giving you a little more adjustable/flexible parameters. The INPUT control to keep the unit from clipping is really not needed at all, as just adjusting the radio's AF gain control will do the same thing by setting (and forgetting) it to avoid clipping, and just using the GNR-1 OUTPUT control for volume. So, technically the GNR-1 basically has two unneeded controls...INPUT and either L or H whereby the DLRdsp has the TONE control to cover both of those. Personally, when adjusting things on the fly, the less knobs to fiddle with, the better.
Performance-wise, the GNR-1 does a nice job of eliminating noise with the NR control, but very similar to how the CLRdsp performs/sounds. I did notice that the reviewer always increased the OUTPUT (volume) knob as he simultaneously increased the NR knob. It indicates to me that increasing the NR level will also decrease the volume (like my 7300 NR control does), something that the CLRdsp does not do...the voice/CW volume remains the same as the noise level is reduced. Both units seem to not have "under water" sounding artifacts, as the levels are increased.
Something the reviewer did not do was switch between transmit and receive, to see if it produces that initial "whoosh" (that I described in my post above) while the algorithm samples/adapts to the noise and reduces it. Would have been a good demo. Again, with 7300's NR in tandem, it's not as noticeable.
This was the first I heard of the Xiegu, and it seems to be a decent performer. The CLRdsp is made in the U.S, and has a one year warranty. It can also have software updates if you send it in to WMR. Don't know about the Xiegu.
Hope my comments help, sticking with your desire to only consider NR units *after* the audio chain into the speaker/headphones.
Bob K7JQ