I use whatever the nin.com downloads have initially, which is usually what's reflected on the cover art - though there are some exceptions, like the expanded version of Bird Box not having a parenthetical, the parenthetical for mid90s not matching the cover, and the Watchmen albums having a parenthetical. The inconsistency doesn't bother me all that much because it's straight from the source.

I do standardize the artist as Trent Reznor and Atticus Ross, though.