Firelands -- Hunter 4.2 questions

[Resperina]

With the upcoming patch, Black Arrow is getting a buff by 40% and I was wondering if it's worth switching to Survival from MM when Firelands comes. I don't know which spec all of you hunters are, but mostly MM I assume. I enjoy SV just a bit more, but what are your thoughts?

[Kruf]

MM is still superior with current gear for single target, but SV is better for sustained AoE.