I will get a C60 OR an Sandy Bridge i5.
If 10", then C60 is your only choice.
If 11-12" You can find a i3-i5 with descrte graphics that's a whole lot faster than the E350/E450
Agree, stay away from all ATOMs, they suck hard balls.
I personally have 10" C50 wih a 1280x720p screen. The extra res is much more useful (at everything) than the 1024x600 seen on Atoms and the HDMI out works perfectly the first time.
Can even play back 1080p video at only 20% CPU utilization.
This C50 can also run Starcraft 2, Farcry2, Skyrim, etc at low settings. and NOT CHOPPY. But it's better suited for turn-based and RTS games. The "slowness" isn't as noticeable on SC2.
Not bad for 1 Ghz and the C60 is only better! http://www.newegg.com/Product/Product.aspx?Item=N82E168...
The 12" i5 with HD3000 video has more CPU/GPU muscle - so it runs like a "normal" notebook.
If you get a C60, make sure you upgrade to 4 gigs RAM. 1 gig is WAY too low. This was difficult on my 10" Aspire ONE, but possible.
If you can't afford a compact i5 and you need 11", then the E350/450 is the way to go. Agree with kitsunestarwind.
Yes, definatly get one of the AMD based systems.
Even the C-60 based system will feel noticeably faster than the N570.
From the two AMD based netbooks you list, the Lenovo Ideapad S205 is the faster option.
It also has a matte screen, which I would call a big plus.
In favor of the Acer Aspire One 722, it has a larger hard drive and the battery lasts noticeably longer.
Probably I would lean towards the S205 if I was choosing for myself as it has a faster APU and a matte screen.
If battery life is of major concern for you however, the 722 will not be that much slower and offers considerable more run time.
Here are reviews of both to help you make a decision (note that the Aspire is reviewed with a slower C-50 APU):