I think I have the necessary accessories, for example, I have a filter QF-1A in my Collins R388/URR, two Timeave DSP-9 filters in my receivers JRC-525 and 75S3-B, and two Timewave noise canceller ANC-4, also a MFJ preselector, an equalizer ART 442 and David Clark military headphones and others military headset, this to HF frequencies; To MW I like to use only the Sony ICF-2010, synchronous detector does wonders, I have a Radio Shack loop antenna, but I do not use nearly, also have a Grundig Satellit 6001.
I think the best accessory is a good external antenna, but today, with all the sounds are everywhere Some accessories are also important to.
I have other receivers like Kenwood R-2000 and Icom R71A but without accessories, only Daiwa coaxial key and Belden RG8-X, also Icom R-7000 to V-UHF and Realistic Pro-2006.
The antennas I use are two T2FD and Discone Radio Shack to V-UHF.
I think I described my shack with few accessories
73 to all..George