I'm not sure how much a poll here on this forum would tell you, because for the most part people here already know and love BIAB, and, I'm guessing, will still buy new versions even if they are offered only in 32 bit, despite misgivings. But I wonder how many folks outside this circle have not even considered BIAB because it offers only a 32 bit version. Perhaps it would be better to do a poll on a forum like Gearslutz, KVR, VI-Control and / or some of the forums for the bigger DAWS (e.g Sonar, Cubase, Studio One etc).

For me at least 64 bits is a major deal. I use BIAB to explore ideas as I compose. I have invested a fair bit in some Kontakt sample libraries which sound superb, but they are just too RAM-intensive to use much in a 32-bit program. Yes, I can make do by composing while hearing RAM-lighter instruments such as those in Sampletank, Coyote Forte, etc, while trying to imagine how they would sound when played through RAM-heavier instruments which to me sound far superior (e.g Spitfire strings, Orange Tree Samples guitars, etc.) but it's just not the same; especially because what I hear at the moment influences compositional choices. (As a crude analogy, imagine that for some reason you had to make adjustments in photoshop in black and white, and then switch programs to see the effects in color.) Having to export from BIAB to RB and finally to my 64-bit DAW just to audition something in an instrument voice I know I'd like to use is a real workflow drag.

My 2 cents anyway.

http://www.youtube.com/watch?v=3tDj_VanH3g