Well, right, wrong, or indifferent, I went ahead and ordered the Energy Take Classic 5.1 speaker system and a Yamaha RX-V373 AVR to power them. I know this isn't going to produce prodigious SPL or wow an audiophile, but for my small room, with my limited budget, and my spouse's aversion to really loud sound, it should do fine. The system came in at $609.
All the reviews I read of the Energy speakers were favorable, and the jury is out on this low-end Yamaha AVR (couldn't find reviews, so I bought on reputation). I'll report back once it's installed with my own review of the components, features, and sound. In the meantime, comments are welcome, including opinions about whether I've screwed up by not doing more homework. :-)