Originally Posted by OpTicaL
There really is no "best". Everyone perceive sounds differently. Some people perfer the ATH-A900ti and some Sennheiser HD650. Even the $25,000 Sennheiser Orpheus which many hands down say are the best headphones in the world may not sound good to your ears.
The "best" thing to do is, go to a high-end home theater store in your area (Magnolia and the like do not count as high-end) and sample the headphones yourself. You never know, a simple $100 headphone may sound better to you than a $300 one.
First, the orpheus system is in the $35,000 range. And while not everyone finds the sound perfect for them, no one on this green earth would tell you they sound bad.
Second, you may prefer the sound signature of a cheaper phone to a much more expensive one, no one is going to tell you an A900 sounds better than a DX1000. Subjectivity does have its limits.
Third, unfortunately, high end headphones in audio stores are few and far between, and sampling them is quite frequently not an option.
Fourth, the A900ti is more overpriced than any Bose. You're paying for a different color.