The problem with H-300 is although a wonderful IEM it's not 100% stable.
Apart from having a signature that might not appeal to everyone (lean/bright/cold) the treble can be edgy depending on sources and genres used, there's no denying H-300 also has its upsides, I bought a pair almost immediately on hearing them, however I also bought RDB Mini which again might not be for the everyday consumer signature wise. I think what Canikickit1 is trying to say is he finds DN-2000 more consumer friendly or finely polished as a complete package.
H-300 bass quality is still some of the best I've heard from any price range and clarity is quite insane though behind the sparkles there's some flaws. I still like my H-300 a lot, I use it paired with Studio V 3rd Anv, it's overly coherent for hearing backup singers and background samples easy though again, I must control the volume levels. Firstly, to stop H-300 from leaning out too much or two, making the treble too hot. After having H-300 for about 2--3 months now the main problem with the T-Peos is treble comes forward before everything else and this remains consistent throughout the volume range. But if you learn how to use H-300 Its a strong contender if the signature suits.
All I know is lJoker gave the Noble4 a 9.9/10 rating, and although I have the Noble4 universal I find myself going back to the H-300 to the point that all my other iems are collecting dust. Great bass, great separation, great clarity, AWESOME price. The Noble4 is going to be my last iem purchase for a while. Can't wait to hear the H-300 with the DX90.