Just found this thread researching the E8as2 sub, I just bought it broken, and am planning on replacing the amp that burnt out and getting it into my system.
I started with a pair of M72's I was really impressed by them. They had great imaging and bass, but unfortunately I blew one of them playing the tunes to high one night.
My next purchase was a Pair of M53's along with the matching center pictured. Imaging was the same sweet sound but now I had more bass. I also picked up the M3ds surround speakers which look nice mounted along my back wall for surrounds.
I also picked up the pair that went with the denon set up from the early 2000's great for near field applications (My computer set up) but they need to be paired with a sub for full effect.
My last bookshelves are currently in use since I had a child and they are the M31's (The first thing the little guy did when he could walk was take the grills off and push the woofer and tweeter, my M53's are vacationing at grandmas house). I dont like them as much as the M72's but their lower profile makes them better than conventional bookshelves.
I'll have to report back on the E8 sub as I'll have to do some DIY to get going.
I find these speakers are great on the 2nd hand market as not as many people have heard them and know how good they really sound.