It's all totally subjective, nobody can state one goal is "better" than another as a fact.
At that level, though, you have assume that they aren't just "kicking it toward the goal", there's no luck involved at all when the strike is so pure and powerful and the ball ends up in the side netting from over 30 yards.
I personally prefer some of the others though, because it's not often that you see goals like those. How many times each season does a player even attempt a run like Nilmar does, let alone score from it? And what good improvisation from Landin to use the heel when the cross is behind him, although if any of those is "lucky" it's that one
These are always impressive:
http://www.youtube.com/watch?v=Do02FAFWGF4 No luck involved there. Spantastic!