I have a pair of Khorns from 1978...so they still have alnico magnets...though in horns i am not sure how important that is.
I have to say I am EXTREMELY satisfied with them. While they are a pain to move and to set up, they are well worth it. I can get GIANT sound using my 2 watt zen se84C (which is of course amazingly clear & detailed). My cables are transparent plus (which are amazingly ahem transparent). Now all i need to do is upgrade the source...sigh. saving up for a DAC. Will probbaly get one this summer.
Overall....these speakers are highly detailed and very very fast. I can actually hear my midfi CD players' shortcomings now (i have a NAD c541i & a sony XA20ES)
....esp. after i recently upgraded the speaker cables & ICs. I would say that Khorns are a work of genius. I take my hat off to Mr. Paul Klipsch. In the brochure, he writes that these are the finest speakers money can buy, so he clearly liked them! ANother testimony: they have been around since 1948! Even the Quad ESLs have not been around that long, and stereophile editors drool over those!
If you go to audioreview and read reviews on khorns, you'll maybe see why so many people like them.
-akhilesh
PS Did i mention i love my khorns?