If it was me, and knowing what I know now, I would be hesitant about getting any of these.
I've just come back from 2 months touring around Europe.
For the trip I purchased an Asus EEE PC 1005PE. It worked OK, but had one very serious issue - the display resolution.
It had the same resolution as the three you have listed (1024x600). There are many programs that will REFUSE TO INSTALL at this resolution (including Panasonic's photo studio program and, I think, Photoshop), and even if you attach an external monitor (at a larger resolution) to install them, some (eg Pana's) will still refuse to run at the lower resolution.
I managed to find a work-around for this that allowed me to run the laptop at a higher resolution , but the images were then distorted and the text was almost too small to read (maybe it's time I got glasses ...)
Additionally, wrt to the resolution , when I had it at 1024x600, my wife found tasks like blogging and using facebook a little painful (she complained when I set the display to its native resolution).
Was I glad I got this? Absolutely ... it was also great to be able to post my images to Zenfolio and to keep backup copies ... as well as keep in touch with others, trakc my finances and download my GPS tracklogs.
Will I continue using it? No - I droped it as I was getting ready to put it through the x-Ray machine at Heathrow as we were leaving Europe - it has refused to start since then - the most likely prognosis was that the Motherboard will need to be replaced (at a cost that is surprisingly close to the price of a new Netbook, and thus not worth doing) - needless to say that I have removed the HDD and have "practiced" dropping it many times since then.
Would I get another one? No, probably not - I'd probably look more into the capabilities of an iPad (with some sort of dongle to load photos), or (shhh, don't tell anyone!) a Macbook. For now I am going to make do with my iPhone and a refresh of the OS and some hardware in my desktop PC.
Don't know if that helps any.
Iain.
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The more I know, the more I know I don't know ...