What weapon should I get/use?

I am currently at Anor Londo (didn't fight the boss) and my main sword, the gravelord sword, it seems too slow and needs too much space to use. Ive been using the Crystal Halberd but its almost broken (really liked how it handled). Now, I have: Dragon tooth, BK halberd, BK greatsword, gargoyle weapons, gravelord sword and some other ones i dont remember