My plan is to get either the 16 or 32GB WiFi version when it comes out and play around with it till the 3G versions come out, the get the 64GB. I have a PC person lined up at work that wants to buy my WiFi version once I receive the the 3G iPad. UNLESS I find, that the WiFi version will do everything I need, then she'll be buying her own.
I have LOTS of music, but I wasn't planning on loading it all up, I'll use the iPods for
music, so the 32, will probably be about right, unless the apps end up in larger file sizes for iPad, than iPod Touch app size.