These are really interesting, I love the combination of the logo's sketchy style with the clean background shapes.
My favorite one, though, is the purple one--the shapes on the bottom are just lovely, and remind me a bit of a keyboard. It is odd that the last "key" is not filled in with a shade of purple, though--did you skip it on purpose? Also, it could do with black splotchy stuff. I'd love to see it replaced with some of the interesting line art you used to border the cloud/bubble shape in the other pieces. One other note on this one: I like the type in the upper right, but I like the clean-cut style you used in the first flyer better.
That said (whew!), if you do go with the first, I'd rethink the white-ish stuff on the top. IMO, it just doesn't fit the rest of the design. I'd like to see the cloud moved closer to the top, then maybe just the solid pink background, or even a grid like you used in the heart shape in the purple piece. But more important than any of that, the two sections of type on the bottom--"5 Sunday November" and "Pure"--seem to be fighting with eachother. Maybe one could be smaller, or something.
Sorry for the long-winded post. I promise, I only offer this much critique because your work is really beautiful and I would love to see it at its full potential. Even if you ignore everything I just said, you still have some nice work!