Gave it a lot of thought, but with the way I use my devices right now, I'll probably stick with the 32gb. Most of my games are either on my iPod touch 4 or PlayBook, so the only ones I'll load up on the iPad are those either specific to it, or that would just be better on a large high res screen (ie. Infinity Blade). I don't have a lot of media on it, just podcasts, and maybe 2-3 movies at a time...everything else I stream. I figured even if I were to load up a few more apps, media, or magazines, at worse I should still be sitting around 3-4gb free. If I travel, I'll leave the iPad at home and just bring the PlayBook and load that up with movies and music. While it lacks the app ecosystem of the iPad, the Playbook's size, 16x9 screen, and stereo speaker setup make it a little better for music, movies and ebook reading, especially when on the go.
All that said, my next iPad will probably be a 64 or higher, if available