I still have a pair of Radio Shack Optimus Pro LX5, which has the Lineaum tweeter. While it's no ESL, the tweeter is way better than a lot of domes.
Are future improvements in Amp/PreAmps slowing to a crawl?
https://www.stereophile.com/content/nelson-pass-circuit-topology-and-end-science
Is Nelson Pass Right?
Is Nelson Pass Right?