Debra Casey Blu-rays

2017 StudioCanal 4K Blu-ray and subsequent 4K Blu-rays are notorius for being heavily denoised and smoothened. Alternatively, 35mm scans for the theatrical cut is also available.
For the Ultimate Edition with the T-1000 searching John's room and the happy future ending, the 2009 Skynet Blu-ray, which is the older pre-2017 transfer, but has DNR.

Best Audio:

Original Kodak/ORC CDS mix: Japan Pioneer DVD in DTS/ac3 5.1

Original Dolby Stereo SR: USA Widescreen LaserDisc and others.

differences of mixes on various releases: see thread and more info here.

Additional Info:

2017 Blu-ray (which has the DNRed transfer), the 2009 Skynet Edition Blu-ray, and the 2000 Ultimate Edition DVD have exclusive extras. The 2003 Extreme Edition DVD has some exclusive easter eggs.

Terminator 2: Judgment Day (1991)

4.3

Director: James Cameron

1080p Blu-ray

Best English-Friendly:

2015 Lionsgate Blu-ray

Best Video:

2015 Lionsgate Blu-ray (but it's missing the extra scenes in the Ultimate Edition)

2017 StudioCanal 4K Blu-ray and subsequent 4K Blu-rays are notorius for being heavily denoised and smoothened. Alternatively, 35mm scans for the theatrical cut is also available.
For the Ultimate Edition with the T-1000 searching John's room and the happy future ending, the 2009 Skynet Blu-ray, which is the older pre-2017 transfer, but has DNR.

Best Audio:

Original Kodak/ORC CDS mix: Japan Pioneer DVD in DTS/ac3 5.1

Original Dolby Stereo SR: USA Widescreen LaserDisc and others.

differences of mixes on various releases: see thread and more info here.

Additional Info:

2017 Blu-ray (which has the DNRed transfer), the 2009 Skynet Edition Blu-ray, and the 2000 Ultimate Edition DVD have exclusive extras. The 2003 Extreme Edition DVD has some exclusive easter eggs.