I really wish I could be of more help here. But since I've never owned the HD419, XB400, or MA100, I'm afraid I can't say anything definitive about them. FWIW, both the HD 419 and the XB400 are known to be bassy headphones, so I would avoid them if you don't want overpowering bass. As for the HD 215, it tends to sound bass light for most people. I personally appreciate it's fast, accurate and detailed bass presentation, but I'm funny that way. If you do decide to get the HD 215, I would heavily suggest that you get an amp that is known for enhancing bass output, like a Digizoid ZO2 or a JDS Labs CMoy with a bass boost built-in. Sorry I wasn't more helpful mate, cheers!