I'm not going to call it a step up, but I would strongly recommend the BLON 03. You may have noticed the hype about them, the hype is real. I modified them to wear straight down rather than over the ear, new foam tips, new cord on the way. They sound great and I'll definitely be alternating between the ER4XR and the BLON 03. The cost is unbelievable considering how they sound.