I had a chance to try the Blon. Very interesting set. On the Shanling its better on low gain compared to the Ety that do better on high gain for my M5s and I think it would hold true for the M3x. Basically this is what im initially hearing. They do sound pretty good especially vocals, highs and details. Here is where it fails as expected is in the bass. The quality clear bass is lacking what the more expensive iems can deliver but in its favor the mid bass is snappy and I can see why people like them which kind of makes up for the short coming. If I could eq the bass I could probably fix the unusual harmonics by lowering the sub bass frequencies so they sound cleaner. I could also break them in for a 100hr to see if gets better including trying different tips. I think the M2X would have just enough power on the single end not to require an amp but I think it will be benefited with the balanced output for just that little more to clean them up. On the M5S in balanced mode they are loud at 40 low gain which is far more efficient than the Etys with the100ohm resistor. So here is my conclusion for you. I have a very discerning taste where I would choose not to use something if I don't like it even if I got it for free. I knew coming in they would not sound like my Etys and that is because nothing else does and I kind of got the hint they will not sound better than stuff that costs 10 times more but actually in a way everything above 500 hz does sound as good as some of the more expensive IEMs which is remarkable and I think the reviews were people are hyping them up are right about them. I can go on and on about them but I think the best way to put it is to simply say, if I paid 150-$200 I would have no regrets, any more than that I would. I might actually buy another pair to gift to my Brother in law for Xmas.