I have the the Ar18s, and original Egg tweeter Large Advents. Sorry, but the Ar18s all the freaking way!!! They are exellent bookshelves! The advents are fun, but are nowhere near as coherent, or as "real" or natural as the midrange in the ar18s. I also prefer the highs over the Advents. Those AR Cone tweeters are extremely nice, suprisingly articulate, and have a very nice smooth extension. Very minimal crossover components in them, but they sound fantastic! The overall coherence just destroys Advents.