Why do you think the 7300 is limited to 200Hz on the low end of SSB? The settings allow you to select down to 100Hz. Tone Controls, SSB, RX, HPF/LPF. My 7300 never overloads because I know how to use RF Gain, and to use pre-attenuation if needed. I have never seen the front end overload. I also get zero interference from AM stations operating at many thousands of watts four miles away. I have tried broadcast band filters and they never seem to make much difference. I must admit my 1026 Noise cancellor and my preselector both include broadcast band filters, albeit pretty weak ones (not a lot of attenuation). Nevertheless AM mixing products is not a problem here. It could be some rusty bolt diodes near your QTH. I prefer the more analog sound of my TS-820S for causal ragchew, but the 7300 does a much better job of removing QRM. I do wish it had multiple pre-AGC notch filters, and a wider transmit bandwidth (it does 2.8). However, I always get excellent audio reports with it, and wider bandwidth is only useful on very quiet bands without anyone else around to splatter onto.