I'm a bit of a Wilson crazy/worshiper- I have the Vigotone, Sea of Tunes, and several other bootlegged "Smile" versions. The one thing I haven't heard mentioned is the now out of print "Good Vibrations" boxed set that came out in the early nineties, which featured many outtakes and tracks from the smile sessions. By far, the best "smile" bootleg that I've heard is this one - http://users2.ev1.net/~bigrynz/ not only is it free, but the guy did a ton of editing in order to make it sound like an actual album.