Meh. I always loved both of them. And I thought that when the fight comes, it'll be extremely difficult for me to choose one over the other.
But, right now, I AM really pissed at Sasuke for actually ever intending to go through with killing Itachi. No matter what Itachi did to him, he didn't have to stoop to his level. (At least from Sasuke's POV).
Furthermore, he would have had a normal, better life in Konoha. He never really overcame Itachi, and he never really became stronger than him before his death.
Sad. :/ In the end, when it all came down to it, Itachi, in my opinion turned out to be a better person than Sasuke. He sacrificed a lot more - his memory, his family, and his brother's love.
Such a sad story. Kishi never even gave them a chance.