Would I need to SBF?
I still don't see myself ever going to GB.
I mean I am happy with 2.0.1, and its fast enough for me. v.6 may be faster, but I am too worried about bricking/ other horrible things.
Maybe I need to grow a pair, but better safe then sorry in my opinion.
If you had never rooted your phone in the first place, it would've received the OTA and been on GB right now.
So go for it.