Joined the forum recently whild searching to resolve other issues and thought I might weigh in on this thread as well. My employer used to have an incentive plan that allowed you to accumulate points that could then be used in a catalogue. When they did away with it, we had to use it or lose it. I saw these speakers with really no description of what they were and cashed in my points. That netted me the Alpha 50's and a set of Alpha 20's. After that I started doing some research to find out what I had and discovered they were priced well below their sound quality by many professional reviewers. Well, that made me happy!
Anyway, I completed the set with a 1200s, 37c, 25es dipoles, and recently found a set of 10's that I am now using as the front high channel. The 10's I bought used, and found the tweeters were damaged. I was lucky to find them since I was using something else for those channels. The price was resonable even with having to replace the tweets. Lots of repair parts still available for Alpha speakers for those who are not aware (FYI). My Onkyo 5008 is in the shop right now, but everybody that has heard these speakers, including a friend who is a professional audio/video guy has nothing but praise for how good they sound. They don't sound as good connected to the temporary reciever I'm using whild the 5008 is in the shop.
I, like many Alpha owners, have no desire to replace them until I absolutlely have to. They are a lot of bang for the buck. If you stumble across any for a decent price, you can't go wrong unless they were abused. From very quiet listening, to levels that will make your ears bleed, they sound crystal clear and clean. I know there is stuff out there that would put these to shame, but they are out of my reach.
Sometimes something shows up on the market that is the deal of the century. It is too bad they aren't still made. A terrific value.