Hi guys - thanks again for more enlightening responses. Roscoe and Rob, in particular, thank you for clarifying the forum's roots and its intent. Understanding that Mr. Chochos funds and moderates the forum for both Omega and its customers (did not realize this at all), I completely understand the desire to keep it Omega-centric. And with that, it's very encouraging to see such loyal customers in support.
Regarding amplification, i took delivery of the Crown 1500 this afternoon. Perhaps I jumped the gun on its purchase, but having seen several positive reviews around the web, and given its flexibility with so many other kinds of speakers (already a marked improvement for my small PSBs, even straight from the ifi dac), I figured that I'd take the chance. Voltage issues aside (thank you, Rob for simple-fix suggestion), purchasing a zen triode will likely be my next step, as I have % further time/money/inclination to tinker.
Regarding the Crown amp: Obviously the sheer power potential far exceeds the speakers' requirements. Seeing now too that each channel of the amp uses a stepped volume control, how do most folks finely adjust for volume? As it stands, 2 notches from "0" on each channel, with my ifi at 100% provides plenty of volume. The little iFi has a volume pot, but my readings indicate that even out of the right/left channel outputs, it's best to run that physical control at 100%, which apparently will prevent dual-amping issues. Given the significant increase in the Omega's sensitivity over the PSBs (~90db), I'm hoping the iTube/nano combination will provide enough flexibility. Any thoughts?
Finally, Ozoid, noted! Nano has been very enjoyable thus far and i will check out the iUSB power system. At a certain point, though, I may just purchase a high quality DAP that can output to my amp and use its own onboard dac. Seems to me that more and more people are heading to DAPs as they become sonically advanced enough to serve as full-plan source components... Always more to wonder about.
thanks, guys.