its all in the marketing..
Mitsubishi for example. the top of the line eclipse is expensive as hell.like.. around 26-27kbut people still buy them.the lancer.. can be cheap as hell, PLENTY of people buying those. and I am sure people will buy the Evo.
WRX, 25k+.. people still buy them.
Nissan has done quite well with the altima, all with the marketing.. I don't watch much TV, but with the little that I do see,I see plenty of maxima and altima commercials, they are cool and I think they get the job done... and people buy those cars.I have yet to see a Z commercial though.nor SER, like I said, i don't watch much TV though.
IF a silvia was brought here.. selling it would be all in the way they give people a need for it. RWD sports car I think people would go for.but only if they kept it UNDER 25... maybe 25 maxed out with options..
And a person who has the money, and had the choice between the Z and the Silvia, I think would choose the Z, probably mostly people who owned Z's in the past, or couldn't afford a 300zx back in the day... the people who bought the 240sx

....now are making more money and can afford the Z..
now....the people who couldn't afford a Z would be able to afford the silvia.
all in my opinion of course...I would love to see a turbo powered Silvia here... that would just rule.although I would probably still get a Z
-Dan