LOL, if I were to spend that for a cable I'd buy a $500 IEM, or go custom!
A very long while back, I got a Nocturnal Audio Hydra cable (
https://nocaudio.com/) from Treoo.com for $65 USD for my custom AS2,. (
https://www.head-fi.org/threads/nocturnal-audio-custom-headphone-cables ). It made a huge difference compared to stock, but been too long ago for me to describe the difference, yet I do remember it opened up the highs.
I did get an idea of the comparison of the V to the E5000, more bottom end, less bright, that's something I think I would like. I hated the flat, microphonic cable that came with my Heaven V, tried to find a custom cable maker to make a different cable but they couldn't. Wearing over the ears and a clip made a huge difference, then again, doesn't seem their IEM's are designed to be worn out of the house, or working out, they are made for serious listening, like full size phones.
That being said, I did notice there was a recent post that someone was looking forward to getting the E5000 and then their full-size phone I had and sold the Pandora VI and despite the sound being absolutely superb it was very, very heavy. It was only comfortable lying down or having my head propped up by a pillow, LOL!!! Again, serious listening at home, but lying down. Maybe they have gotten lighter.