It is worth it when sound quality is very important to you. They give you a very rich sound which and you can immediately tell that this is a high quality speaker system.
If it is not that important to you then the HK is also a very good option and plays nicely.
I would not go under HK to Hifi or to standard, because those are really just too basic and don't offer a good audio quality, but are more suitable for listening talks shows or music if you do not care about the audio quality at all
