Damn, the tweeter on the RC-10's is sweet. To me, they really hit the mark. I don't see how people call them laid back. It sounds super neutral, open and detailed to me. The speaker overall may sound warmer because of the over-emphasized mid-bass and low midrange, but the tweeter is spot on. The RC-10's have better dynamics and sound more bombastic/grand than the A1b's. However that excessive lower midrage/mid-bass can get out of hands sometimes and really muddy up a song. I will have to run correction to see how they turn out. I hate using electronics to fix a problem that shouldn't be there in the first place but in this price range compromises must be made. If the midbass and lower midrange doesnt bother me when its all setup then i think the RC-10s may have the A1b's beat in my book. I will still get the EMP Teks though just to make sure my bases are covered. I have a feeling they are going to sound like the RC-10s minus the excessive midbass/lower midrange.
Main System: SVS Ultra Towers - 15" custom ported subwoofer - SVS PB-1000 - Yamaha RX-A740 Aventage. 125dB @30hz, 16hz @ -3dB
Computer System: Carnagie Acoustics CSB-1 - 12' Onkyo sealed subwoofer - Pioneer VSX-92 THX
Other speakers owned or auditioned: Aperion T6 - Ascend CBM-170 - Energy RC-10 - Wharfdale 10.1 - Arx A1b