Hello d marc0,
DN-1000 has a wider soundstage, a bit more mids focused, but sometimes instruments sound a little congested in the mids. The Dunu has a nice thickness to its sound.
AX-60, believe it or not, has thicker sound. The sound soundstage isn't as wide as the Dunu, but there is more space between instrument and better imaging. Bass is more, thicker and cleaner (even with the neutral filters). Vocals have more air around them. Again, the mistake I made initially was trying to wear the AX-60 the way I wear the DN-1K. The Dunu required a deeper insert to shine its best. The Astrotec requires more of a shallow insert. I also think the AX-60's signature is a bit more refined than the DN-1K. Both, however, are very good sounding IEMs, I don't feel like I want to get rid of one for the other at this point. The signatures are different enough. I did feel, however, that I didn't need the H-200 once I bought the Dunu.
Thanks ericp! Personally, I feel the H200 and DN-1000 compliment each other really well. I'm definitely keeping both: H200 for heavy metal and other fast tempo genre; then the DN-1000 for EDMs, pop, and slow music such as RNB and slow rock.
I can't wait to get my hands on the AX60 for review especially now that I have read the impressions by you and the others who've tried them. What makes my wallet nervous is if I'd end up wanting them so bad...