Thanks for all your replies; I very much appreciate them.
As it happens, I was looking at a pair of Farella 400s on e-bay that were priced at $419.00, but they sold last night or early today (after being listed for over a month, I believe). At such a low price, comparatively, I thought they would be worth A/Bing against the Klipsches if they were as revealing as the one or two reviews I found on line mentioned. If a pair shows up on Audiogon for reasonable money, I'll probably buy them, based on what you've all said here.
No comments on the Audio Notes, which leads me to believe that they're not well-known and probably no better than the Heresy's that I have now.
If anyone can recommend a logical step up from the Heresy's, apart from other Klipsches, I'd be very interested. I'd like a fast, revealing, almost-bright speaker priced around $1500. It doesn't have to have amazing bass; I'm fine going with a subwoofer.
Thanks again, all.