i think this has fail written all over it tbh
i get what youre saying, and ideally would be great
however, what of regular readers but infrequent posters? would limit their access but they would be no less a member?
would it not also create a core of 'inner members' posting potentially valuable info that people would miss if they dont get access? even if you duplicate it around the forums its a bit ott
i think the answer is simple.
if you are holding a hot potato then make a shout and then take it to private messages to spread the word
eg
if i knew of some recaro seats i could post about it, then tell people further info if they pm me
..i dont know of any btw but thats the simple fix
there is the option of closing areas for non registered members, but to do that widely would go against the site ethos? freedom to browse?
purely my opinion of course, but restrictions would be a knee jerk reaction