Well, Well. I often wondered why no one else mentioned these speakers. I am the proud owner of a pair of D-7's I purchased new in 1985. Still have the paper ID tags glued to the back panel. They are retired. The cabinets were made of a particle type fiberboard(JUNK). My woofer foam has rotted. I never liked the mids, but man they would scream. I did think the horns were the best tweeters CV ever had. These babies would jam all night without breaking a sweat. I went through a set of seperates, and a couple of receivers. The CV's held their ground.
Today, speakers are far superior. Poly cones, Kevlar cones, metal cones, butyl rubber surrounds, and titanium used in the voice coils & for many tweeter domes. Much better than the paper used in our CV's. Most cabinets in brands mentioned here are medium density fiberboard(MDF). Much better quality than that particle fiberboard. Many manufacturers go to great lengths to build exotic cabinet internals. One of my favorites is B&W. Poke around their site and look at the passion put into their product. There are many other great brands. I will list a few off the top of my head for you to research. I am sure others will come in with more great options.
B&W
Paradigm
Monitor Audio
Vandersteen
MB Quart
MB Quart is hard to find out about at the moment. They have been purchased by a new company, and there is no US website. I just listed because that is what I have, and I love 'em. But I use them for HT with a powered sub.