We will shortly have the SIA2-150 and the CA2/P1 pre/power in store (waiting for ATC to finish building them!), so as soon as I do and can try them together with a few different speakers, I'll be able to relay my findings on here for you. Even though the pre/power is just a two box version of the integrated, I think the usual benefits of a two box amplifier will be well worth the extra few hundred over the integrated amplifier.