The Aurvana X-Fi over-ear headphones are Creative's entry into the world of active noise cancellation. Unlike many competing noise-cancelling headphones, the Aurvana X-Fis allow you to switch the noise cancellation on and off, and will let you listen to music even if your batteries are dead. The Aurvana X-Fis also feature a few filters that change the way your playback sounds. Despite these extra features, the X-Fis manage to be priced at $300, which seems to be the average rate of noise-cancellers these days.