Well, we've had:
sense-mod vs. no sense-mod
Pro RAM Controls vs. Anti-RAM Controls
Star Wars Chair vs. Outrun Golfcart vs. Mideval Madness Chaise Lounge
JAMMA vs. non-JAMMA
Sega vs. Nintendo
Marvel vs. Capcom
Mary-Ann vs. Ginger
...and now this has devolved into a Cats vs. Dogs war.
Perhaps it should be moved to Talk About Anything?