Impressive. And to think I removed my PA4100 and left it in its case because of "not so good sounding"... guess what it needed was some better tweaking and specially better speakers. Indeed I had a system similar to yours as I had a PA4100 for mids and highs and a PA275 for the sub. A very very stupid installer managed to blow the 275's internal caps and that was indeed the beginning of the end of my first really important install. Sigh. Now I'm still working on details of my three-Genesis-amp system. Has anyone heard about the new "audiophile" speaker series? I'm considering a set of those for front stage...