Our tastes seem to overlap significantly and I have loved KR5 for the last 6 months or so. It seems able to handle anything I've tried, from more delicate and laid-back prog to heavier, more complex, denser music. I haven't ventured too far into the current metal scene, being more inclined towards classic rock / hard rock / blues / prog, but KR5 seems to strike an amazing balance across the board. It disappears and just presents a great musical experience.I'm thinking in buying one of the Frontier Series but only if I can sell some of my gear. I listen to a lot of prog/metal/rock genres. Which one would be better suited for kind of music?
I've only tried NE4 and XE6 once so don't have a firm view. Both struck me as warmer than KR5. NE4 is perhaps more raw and visceral in its presentation, XE6 is just massive in terms of sound, but has too much bass for my tastes. I think any of the Frontier series would be enjoyable but I would lean towards KR5 for your music if I were buying blind. It seems the "safest" option. If you can try them first, that's a different matter.