The Terminator 8/10
Terminator 2: Judgement Day 8/10
I had both seen them before, T2 a few times. I was especially surprised at how good T1 was! I really enjoyed it a lot and I thought it was very scary in at least 3 scenes.
Next on my list is T3 (seen it once, wasn't too fond of it) and then The Sarah Connor Chronicles.