I think the Asus Transformer might be a great option: www.asus.com/.../Eee_Pad_Transformer_TF101


Watched a bunch of video reviews of it from YouTube and it seems very capable + I get the keyboard so it will be a (very good resolution) netbook if needed. Supports plugging an external 2.5" hdd right to it when using the keyboard dock. Maybe even with only the tablet if someone makes an adapter for the dock connector. Battery life is also good in tablet mode and excellent with the keyboard. And on top of all this the price is quite ok, starting at $399. (16GB without the kb-dock though, $549 with the addon) Now I only need to wait for the 3G version which should come out in August.