I think it's hard to go past 1990.
Only in the sense that if you were listing the best grand finals ever, you'd get to that one around the time you ran out of grand finals to list.
though it was before my NBL time, 86 between Adelaide and Brisbane would have to be up there by all reports.
Really? Game one was great, but the other two were blowouts. Pearce and Bruton were awesome in game two, but I honestly don't even remember anything about game three.
I know these things are always better when you're actually seeing them unfold live (whether in person or not), but even looking back now I can see why anyone outside Perth would nominate 1993. 1986, not so much.
'98 Adel vs SE Melb
'94 North vs Adel
'03 Syd vs Perth
All sweeps featuring a blowout in game two. After a fantastic game one, mind you, and Feaster going for 40 in 03 gives it some rewatch value (I'm not familiar enough with the other game twos to comment on those), but I wouldn't have them on a 'best series of all time' list.
Great grand final games in otherwise dull series? 1994 G1 would be up there, along with 2011 G2 and 2015 G2.