I replaced the original Continentials with A2s. They are a stiffer tire with a little more road noise at low speeds. However, at high speeds they are wonderful. Also, you can put the max pressure in them with little change in ride. About 4k on them. The wear on the tire looks goods for such a soft tire. I didn't expect them to be a high mileage tire so I am very happy with them.

I just installed these tires on my 1998 S70 (FWD) and I am very happy so far. They are quiter, cheaper and better handling (so far just in dry and wet, no snow) than the original Michelin MXV4, but they are H rated (MXV4s were V rated, but who cares? H rated is up to 130 MPH, my car's top speed is below that. Even the H rated MXV4 was almost twice the price). What more can you ask for? Wear? I don't know about the Dunlop Sport A2s, but my Michelins MXV4s were pretty close to being worn at 35K miles (and I don't use them in the winter, since they are absolutely useless in foul weather). So, I like them, especially for the price - I bought mine at Tirerack for something like $53 each.

Good luck
--
Vladimir. 1998 S70. Base, 5-speed manual.

I have 10k on my dunlops with no complaint except that they are noisy. I'm not sure if mine are the same as the ones you mentioned but they are "H" rated. I'll check the model designation when I can.