You should qualify that if you are using either the Ibasso T3 or Topping NX1 with an iPod Classic.
The W60 sounds insane from my Benchmark DAC1. Even directly out from my Macbook Pro Retina headphone jack, it is nothing short of superb. There is simply no need to add an amp if the source is good.
When used with my iPod Classic 7th Gen, the W60 sounded terrible, or, to put it bluntly, unlistenable. When paired with an iTouch 5th Gen, the sound is much better.
Synergy and pairing is important for any audio setup.
High price doesn't necessary mean 'better' sound, vice versa for low price.