System building is an ongoing pursuit. I find we often make changes to get a new flavor rather than an improvement (search your own soul here). I've had perfectly satisfying systems and had to make changes to adapt to a new room, rather than absolute improvement. Here are my two favorites: Set up in the living room of a split level ranch with an L shape dining area. There was more volume here than any woofer should ever be asked to cover, but this system disappeared like few I've ever heard. Eggleston Andras, Omega Micro speaker cable, Symphonic Line RG-4 Custom amp, Harmonic Technology Pro-Silway II IC's, Sonic Frontiers Line 3 (the very one that started the SE upgrade, instigated by yours truely!), an AHT P phono stage and a Basis Debut Gold MK III with a Wheaton Tri-Planar V and a Symphonic Line RG-8 Gold. The digital reproduction was handled by an Esoteric P-2S feeding an SF Processor 3. System #2 was in a room about 13 X 17. It included a pair of Merlin VSM Milleniums, 2 pair of H/T Pro 11's, the RG-4C, 2 pr. of Totem (yes, Totem!) IC's, in and out of the BAM, the aforementioned Line 3SE and AHT, and a Versa Dynamics 2.0 with a Clearaudio Accurate. Digital was the Pro3 but the transport was changed to a Forsell Air Reference MK II. These systems didn't just get my foot tappin', sometimes I just had to get up and boogie!