I only did the RF modifications to my DX394 and none of the audio ones as I don't listen to music or other broadcast transmissions. I had the DX394 and a Icom R75 connected to the same antennas using a splitter and sometimes the R75 received a signal better and at other times the 394 had a more clear signal. Maybe it was lack of selectivity that made the 394 work better if there where no interfering adjacent channels but in a crowded band the R75 might do better but I never though of that, they just performed differently but the R75s reception where not superior in any way to the DX394. But of course the many features of the R75 made it much better to use.
But having a spectrum display from a SDR dongle makes that much better as you instantly can see where a transmission are taking place and don't have to blindly tune a VFO over the band to find active transmissions. You can usually also save a whole frequency band to a file and then play back and tune in to stations that you missed.
/Ubbe
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