I am, but think I would currently prefer the SQ-N100 as an amp only. I find my HRT is a great source and "good" enough for my current needs. The few reports of the N100 with headphones has my knees all wobbly. If I can somehow get my hands on a pair of HE-5/5LEs between now and graduation, then the N100 is a sure thing.
I now it seems absolutely crazy to have a budget of around $3000.00, and only allocate $250.00 of it on the amp. But there is a member of the forums who has been using the Asgard with the HE-5LE and says he has listened to more music in the last few months than he has in a long time. Plus, this option would give me a iMac to use as a music server, allowing me to use my laptop only for school rather thank forcing it to multitask as a server. I also get one of the best headphones produced, I keep my magnificent source, and cardas cabling all around.