I also think that "Vintage" or even "Classic" means rosewood and teak. Where else would you draw the line?
The Beocenter 9000 was introduced in 1986, the same year that Beosystem 5000 ended.
In my view everything from the Beosystem 5000 and later are quite modern. But what about the Beocenter 7007, which was introduced in 1983, the same year as the 5000 system. Since there's always been products of different designs produced at roughly the same time, it's really not that easy to set a date at which the "Classic" or "Vintage" era end and the "Modern" era begins.
That's why I'd also like to see subfora dedicated to specific systems, or ranges of systems, for example the BC9000 range, the BS5000-7000 range, and so on. But I also don't want the forum to be absolutely clogged with subfora.
Oh, and I'm not sure about the vocabulary, but in my world "fora" is the plural form of "forum". Or perhaps I need to brush up on my Latin.