By far, the best power cord I tried on the Modwright SWL9.0SE was a Purist Audio Dominus Ferrox, but it's out of your price range. It added weight and body. The second best cord was a Ridge Street Poiema!!!
I don't think the Electraglide would work particularly well.
Perhaps a Shunyata Python Vx, even though they are generally intended for digital gear. IMO, the Modwright needs help to "fill out" it's sound...especially the midrange.
There are quite a few SWL9.0SE owners on Audiogon. You might contact them individually by email and ask what they use.