It does not. (unless you are talking about the optional DAC, see my recent review)
Not sure WA2 would be the best choice. The M-Stage would at least give you time to try other things, especially if you can attend meets.
I've read your review, so should I just get myself the HPA-1 and save myself some money? And regarding WA2, I've read numerous report that it pairs exceptionally well with HD800, have never heard one in person though.
I highly recommend the M-Stage, it's a good match for the HD800 and outstanding for it's price. Very solid build quality under the lid.
It's commonly known as the "lehmann black cube clone". That was the amp the HD800 was designed with and is about 3x the price.
It's a fast detailed amp that isn't overly bright, and that's exactly what the HD800 needs.
I'm not a big fan of low-end tube amps. If you want a tube amp be prepared to spend at least $800-1000.
On a budget I'd take the m-stage and a nos dac in a heartbeat.
I am aiming for the WA2, that's why I'm in a very serious doubt. Should I get the M-Stage, or save the money and go for WA2?
Also, this may sound weird, but I don't like my DM100 very much when paired with WA3. It makes the highs sound harsh compared to the now-gone Modi. So if I go for M-Stage, should I go for HPA-1 without dac, or HPA-2 with the dac option? Thanks.