I'm currently using Logitech Z-2300 2.1 speakers and occasionally I use my Sennheiser 555s. I'm thinking about buying the Xonar DX; it looks like a great card and I'm liking what I'm reading about it but is it overkill for my 2.1 setup? I do my fare share of games, movies, and music and I'm wondering if the Xonar DX's capabilities are going to be wasted on a set up like mine.