There's certainly a lot of factors to consider.
All the DefTechs I've owned (BP7000SC, BP7001SC, BP10B, SM450, CLR3000) sounded great for both movies and music (classical and rock/pop).
There was an AH member who bought some EMP speakers some time ago. I can't recall his name. But he sent me a PM saying that he did not like the sound at all. He asked me about DefTech. Anyway he returned the EMP, and tried some DefTech BP7xxx speakers. He later sent me another PM saying that he totally loved the sound of the DefTech and was going to keep them.
Obviously a lot of people, including myself, have compared and auditioned other speakers, and love the sound of the DefTech speakers.
I've owned NHT as well, and I also love the sound of NHT.
So many factors. But after you've auditioned a lot of speakers, when you come across a set of speakers (whichever they may be) that sound great to you, you will know it immediately.