In 10 years (2008) what Audis will be classics?

[RODNEY MICHAELSON <HOTROD@pacbell.net>]

Back in 1975 my wife and I bought a 1966 Plymouth Valiant Signant 
convertible off a small dealer lot for $600. The car was in great shape.
Drove the car for 5 years and sold it for $500. In 1995 I couldn't find 
one for 5 times that much. A 1967 plymouth valiant wouldn't be worth 
$100.
The question is which audi(s) will stand the test of time? Since the
technology of automobiles is improving with more and more computerization 
are the technologically advanced cars just staying a few years ahead and 
the term classic not apply?
I'd like to think my Audis will not suffer the grim reaper time and 
become some shreaded steel in a Korean car.
Rod Michaelson