FWIW, I started with the Sennheiser universal fit that came with the G3 wireless system. Total garbage. I upgraded to Ultimate Ears UE-7. Much better but I could never get my guitar sounds to feel right. Personally, it just didn’t have the dynamics I was hoping for. Eventually splurged on JH Audio Roxanne right before the pandemic. Wow, what a difference! Bigger sound stage, much more detailed, but…Very annoying top-end ice picky frequencies had to be EQ’d out. After being EQ’d I was really enjoying them. I must say though the hard acrylics are very uncomfortable after about an hour. Unfortunately, those IEM’s were stolen late last year. I had to replace them quickly so I went with the KZ ZAR off Amazon. I was shocked to discover how great they sound without any EQ! And when I compare their sound to the sound in my wedge, it doesn’t sound wildly different but very similar. I’m very happy with the sound and feel. I’m in the process of getting custom molds for them from a company called ADV. As a gigging musician, I also really love the idea of being able to replace these quickly and easily without having to take out a loan. Anyway, just my experience. Hope it helps some.