Having recently made the transition from separates to integrated (Vac Phi Beta), I am very pleased with the result. Of course fewer interconnects, cords, and less space required, but beyond that I now have the best sound I've had in my system. Last incarnation of separates was: Mcintosh 501 monoblocks, with Aesthetix Janus Preamp. In considering Vac Integrated versus Vac separates, I encourage you to call Kevin Hayes who builds them. He can clarify the differences--It is clear that he is very proud of the Phi Integrated. Good luck.
Joe
Joe