Muse is awesome; they're kind of like a more rocking out version of Radiohead.
The nice thing about Muse is that they are a good test of your sound system; they sound decent on the car stereo, but blast them with a good set of headphones and you notice all these nuances in the music that were too muddled to hear in the car. To me the thing which differentiates a good band from an excellent band is the multiple listening pass test - in other words, does the music sound better ever after listening to the same song 20 times?