Memory requirement (for HDD) for Android based tablet? Background: I'm currently considering buying a Acer Iconia A50x Tablet device that runs the Honeycomb OS. The device is available (or, well, not) in a variety of configurations (16GB / 32GB / 64 GB "HDD" and with/without 3G module). It seems the 3G version is only available with 16GB atm. and the non-3G version is available with 16 or 32GB atm.

Since I do not have experience with android devicesread: I've no clue whatsoever how much a "stock install" of android needs and how much space the apps take, and whether they can be installed on SDHC card etc. I have no clue how much memory for the "HDD" is a good choice for such a device: (apart from bigger is better)

My question now is wrt. the onboard "HDD" memory: Is 16GB enough or would it be better to try and get a 32GB version or wait for the 64GB version? (After all, I can just plug in a 64GB SDHC card for additional space.)

Wrt. to my expected usage: I plan to use this device to surf the web, read emails and maybe a PDF or two. I do not currently plan to play any specific games. My music collection on the PC is only 6GB, and I would only use a small part of this on the device. No films to speak of.
This is really an "it depends" answer. If you are only installing applications and streaming any media you consume, 16GB is sufficient. If you are copying media locally, 32GB should be a minimum.

By way of example, the tablet I was using on my last vacation only had 2GB used. My son's was full at 16GB with the movies and TV shows we'd copied on to last him a week and he ended up watching the same shows over and over.