I've read that the Adam Audio F5s are better than the Emotivas, but they're also $150 more expensive per pair (F5s: $500 vs Airmotiv 4s: $350) and I don't know if the price increase is warranted? I've never heard either speaker in person, this is all just research. They're certainly both fantastic speakers and almost undoubtedly better than the Audioengine offerings.