Jan:
Thanks for your fast reply and apologies for my own slow response. Insofar as the question about what I'm trying to accomplish is concerned, most of the acronyms you wrote look like a foreign language to me. Being a technical neophyte, I just want a plugin that runs my site with maximum speed from behind the scenes without requiring much if any maintenance. Customization and such concepts are far too advanced for me at this stage in the game. Besides that, W3TC seems to be geared toward paid premium subscribers with high technical skills.
Thanks again for your feedback and I'll go deactivate W3TC right now and turn Super Cache back on! ;)