I've just learned that the Sony MDR V6 Studio Monitors headphones are still available after more than 10 years of thinking they were not! I guarantee that if you mate a set of these to the X-Fi you will be ...I'll just say, you'll be more than satisfied, their bass is deep and their highs are clean, way past human hearing. I'm about to order these practically free ($70 for that quality, equates to being practically free IMHO) just so I can experience the bliss I envision this combo will create.
I just cannot beleve they're still making the Sony MDR V6. Audiophiles-on-a-budget rejoice!