HD600 guy here again with a follow up question. My current closed backs are V- Moda XS (on ear). Though i really like them and have for years, the small field/stage and overall thick character (big bass & low mids, smooth top) are what I'm trying to move away from with my next set of closed backs (in addition to a step up in overall performance/quality). I was hoping that the 99 Classics would be a good contender, but with so many here describing the 99 Classics has having a big low end and lots of warmth, I'm now wondering whether they're too similar to the XS for me. Anyone familiar enough with both?