I'm probably a bit late replying to this so please excuse me. I don't drop by as often as I should.
When I was looking to replace my Lowther Accoustas with Klipsches (I originally purchased the Lowthers from the UK Klipsch importer Guy Holdsworth and he persuaded me to go with Klipsch rather than my preference at the time, Tannoy), I wanted the CF4s. I'd heard them at a hifi show, thought they sounded great, and also that they looked wonderful. So when Guy offered me his ex-dem ones at half price, what could go wrong?
He brought them over in a trailer for me to try in my room. Well, whatever I did I couldn't get them sounding good. The high frequencies were very bright while the bass was very lacking even positioning them right in the room corners. Looking inside (the reflex tubes are wide enough to get a torch and mirror in!) I saw little in the way of high technology -- plastic horns, scattered foam damping, tiny-looking crossover, etc. I dared mention this to Guy and his suggestion was...
He brought over a pair (also ex-dem) of Forte IIs. Smaller, less visually impressive, even old-fashioned. Yet they just sang. Better bass, much better imaging, simply better. I so wanted to like the CF4s -- I'd been thinking about them for a long time -- but in my room at least there was no comparison.
Since I purchased the Forte IIs I've installed upgraded (and external) crossover, titanium tweeter diaphragm, and some deflex damping behind the woofers. I'm awaiting the current Klipsch importer getting back to me on titanium squarker diaphragms, and I still think one day perhaps I'll find a great pair of K'horns or Cornwalls for £500, but until then I'm very happy. I don't miss the CF4s, even though I still have the brochure and sometimes take a look at what might have been.