Japan Geneon 2008 or UK Optimum 2009 Best for extras: Skynet Edition (2009) or Lionsgate (2015) Best all-around if you must buy today: None – consider waiting for a 4K restoration (or buy the 2015 Lionsgate and accept flaws)
Most Blu-rays have excellent lossless audio: terminator 2 judgment day bluray top
The 2015 Lionsgate Remaster is widely considered the best overall viewing experience for home theater purists. Japan Geneon 2008 or UK Optimum 2009 Best