I prefer X3 over PL30. In fact, I prefer PL20 and PL11 over PL30. The problem with PL30 is the fit. No matter which eartips I used, I can never get a good seal for more than 5 minutes. So even thought PL20 and PL11 sound not as detail nor as specious as PL30, I still prefer them, especially consider them both have better bass than PL30.

If you want to try some different from X3, PL11 will be more fitting. It is still very close to X3 level but with a different sound signature.