I have four pairs of headphones. I've used black "no-name" detector headphones, Jolly Rogers, RatPhones and Grey Ghosts on the E-Trac. I use the Grey Ghosts all the time. I tried the RatPhones again a while back and I didn't last 10 minutes before I went back to the car for the Ghosts. All the high sounds were muted and muffled and I felt like I had cotton in my ears. The Ghosts give me higher pitched sounds and I hear every snap-crackle-pop, which is what I want. I think a lot of it depends on user preference. Some people like the Rats, but not me with the Explorer or E-Trac (they're fine on the Fisher CZ). The Jolly Rogers are good, but the earmuffs are a little small for me to wear for a long time. They sound different than the Ghosts, but they are still good. The no-namers are also ok, but you can tell the sound quality is not that good and it gets annoying when you know it can be better.
I think you'll find a good amount of variation in people's opinions, just because user preference plays into it. If you search here or in the Explorer forum, I think you'll find a lot of differing opinions and good info about a variety of headphones.
I couldn't afford a lot of headphones at one time either, and what I did back then was I bought a pair, tried them and then if I did not like them sold them on the forum classifieds for a little discount over what I paid. Sure, it cost me a little, but I wasn't out the full amount of the headphones. The ones I kept were the Rogers, Rats and Ghosts. I'd buy another pair of Ghosts in a heartbeat if these gave out on me.