In the US, the AD700 is less expensive than the other choices you mentioned. It can be bought now at amazon.com for about $110, and this is a little higher than the usual price. It has a natural balance, with an airy, spacious soundstage. I find it very good for classical music. It does not need an amp. Many find it light in the bass. I say that it has a very musical, non-resonant bass. It is open, very large, light, and, to most (including me), very comfortable. Some, however, find that it does not clamp sufficiently and moves too easily to be truly comfortable.
Edited by MarcoGV - 12/13/12 at 7:56pm