What is the best multi-band radio for detecting dirty electricity?

I already have Sony ICF-P26. It's sensitive, but its measurement range is not wide enough. Another flaw of this product is that its gain is affected greatly by where my hand is on the radio. I looked into Radio Shack 12-467, but I decided not to buy it.

Anyway, I'm looking for a radio that measures a much wider range than Sony ICF-P26.

I've narrowed down to a few candidates.

Tecsun PL-310ET or Tecsun PL-380 // Both measure the same range.
Tecsun PL-600 // measures a wider range than PL-310ET and PL-380.
Degen DE1103 DSP // https://swling.com/blog/2015/11/the-new-degen-de1103-dsp-first-impressions-review/

Do you know a good one for detecting dirty electricity?

I narrowed options down to Tecsun PL-310ET, Tecsun PL-380, and Tecsun PL-600.

I think I will buy Tecsun PL-600 because it covers low frequencies without a gap and is affordable.