In my view (and I have limited experience as the best IEM I owned before was a SE535), the reshell and additional drivers improve significantly on the 530. It sounds better than the 535, with more clarity, better instrument separation, larger soundstage and more controlled / quality bass. Even if it is not comparable, I also think it sound at least as good as my ATH ES10, with are high quality headphones. Besides, the perfect fit makes for much better immersion into the music. According to Unique Melody, they are not at par with their Miracle but still pretty good 6-drivers 3-way.
I wish you would test Unique Melody's products. I know they have been tested by everybody, but it would certainly help in terms of reference. I would love to see how the Miracle compares with the SE5.
Thank you for all you advice. I still think I'll get the DX100 now and upgrade IEMs later. It is easier for me to buy the DX100 (I live in China so no customs and no transport !) and resell my Cowon Z2, X7 and Ibasso T3D than try to resell custom reshells...who would want them ?
With such as player as the DX100, is a portable amp really worth it or does it just add the final 5% of improvement (with CIEMs I mean). Which one would you advise? I think you mentioned the Portaphile 627?
Finally, I have a sound compression issue. I have everything in standard lossless flac. Would 24bit really improve much? It's really expensive and rare and would be a pain to re-buy so much music...Besides, I think that many albums have poor recording / mastering and having them in high fidelity does not help much...
Hope I didn't bother you too much and thanks again !