Anybody have any experience with the E.A.R 890 Amps? Have you run them in Bridge mode? How do they compare to amps such as the ARC Reference 110s, Ref 210s or anything from LAMM, BAT or Einstein? Are there any type of speakers that work best with these amplifieres? What do you find are their strenths/weaknesses? Any particular cables work best with thes amps or ones that should be avoided?