Defintely SuperSolider. I bet nobody's heard of it but it IS brilliant. It was very low-budget but it had a fantastic story which didnt really need the big special effects.
It was a good few years ago that I watched it but from what I remember the story was about a solider who was given superstrength from some evil genius's machine. He was meant to be used for evil purposes but he escaped and decided to use his powers for the greater good.
We see him get used to his powers and thwarting several small crimes as the SuperSoldier. We also see the relationship with his wife go through some problems, and they have a massive row. Our hero storms out, and whilst he is gone the wife is kidnapped by the evil genius to lure SS back. He comes to the rescue and defeats the bad guys, but not before his dear wife is killed...