I am talking about using the HD800 for portable use.
1. I have read from multiple sources that the ALO Audio RX MKII is perfectly capable of driving the HD800.
2. People have done this before. I'm sure that I've heard of this a few times on Head-Fi
3. In my mind, headphones were made to be portable.
The HD800 is the most open-air dynamic headphone on this planet.
You're currently using the Sennheiser HD 280 which costs $99, and want to jump straight into a $2500 portable rig that will leak like the titanic.