In addition to my KiwiSDR use, I have been doing similar stuff with Perseus for a few years. I have evaluated many antennas. The Clifton whip is a great antenna but I found it to be susceptible to VHF/UHF overload from the many TV/FM stations 1/2 mile from me. I have tried Wellbrook (older), Pixel (now DX Eng.), W6LVP and now MFJ loops. The Pixel is my first choice while the W6LVP and MFJ follow closely behind. More details in the future.