Following are my most recent notes for those of the wines on your list that I have tasted.
Chateau Rieussec, Sauternes, 1975: A vintage year that proves itself time and time again, the very best of these wines so thick and concentrated that you might swear they were tannic. Dark almost bronzed gold in color, with fine botrytis influence and opening to reveal a tantalizing array of dried apricots, and poached pears all on a spicy background. On the long finish hints of minerals and candied apples. Drinking very well now but don't hesitate to cellar this one until 2010. Score 92. (Re-tasted but not blind 30 Oct 2006)
Chatreau Rieussec, Sauternes 1981: Appealingly sweet but with little botrytis influence in its youth but now, like many of the '81 Sauternes wines taking on overly acidic, nail-polish aromas and oxidized flavors. Well past its peak. No longer scoreable. (Re-tasted twice with consistent notes 19 Aug 1997)
Chateau Rieussec, Sauternes, 1982: Burnished copper with orange tints, a generously sweet, full-bodied Sauternes. Not much botrytis influence here but honeyed apricot, dried apples and lemon curd aromas and flavors. Drinking well now but showing first signs of age and not for much further cellaring. Drink now or in the next 2 – 3 years. (Re-tasted 9 Sep 1999)
Chateau Rieussec, Sauternes, 1995: Deep golden yellow in color, this concentrated and full bodied wine offers up generous honeyed sweetness that is well balanced by natural acidity. On the nose and palate look for deep honey, citrus rind, mineral, pineapple and flowers and on the long, long finish of this creamy wine look for the entry of browned butter and smoky flavors. Drinking well now but the wine should cellar comfortably until 2015. Score 93+. (Tasted 16 Feb 1998)
Chateau Rieussec, Sauternes, 1996: Full bodied and with plenty of acidity, this beautifully structured wine shows the effects of botrytis beautifully. With honeyed pineapple, white peach and apricot aromas and flavors, all accompanied by an almost flowery finish and with rich flavors that linger very nicely. Approachable even now but the wine should cellar nicely until 2010 – 2015. Score 93. (Tasted 6 Oct 2001)
Chateau Rieussec, Sauternes, 1998: A truly exquisite Sauternes. With a color that varies from that of bright yellow straw to almost orange-green as it picks up the reflections of the light, and showing the most positive effects of botrytis, this full bodied wine is drinking beautifully now despite its youth but will cellar nicely until 2020 – 2025. Bless the winemaker, who has managed to coax exquisite creamy fruit and somehow smoky, earthy flavors and aromas that linger almost without end. My own choice will be to drink this one without food in order more to contemplate on the wine itself. Score 94+ (Tasted 9 and 12 Oct 2001)