How much BCB RF do you have there? I have 7 5-10KW stations within 5-10 miles and they dont bother my NC-303 even on 160/80 with inverted V's at 180' on top of a hill and LOS to the AM towers. Coax fed antennas and using the radios antenna trimmer do the job IMO.
OTOH I had to build filters for the 500-750' Beverages for use with a TS-940 on 160, the TS-950SD seems to be immune.
The sliding coil carriages of the NC-100 thru NC-240D and variants use very similar LC assemblies as the HRO and are also bullet proof