Don't get the Sony, and the Illiad is overpriced.
Take a look at the ones available locally first to see if its a good enough solution. The ePaper screens are all the same, so its a matter of differing driver firmware and OS.
www.mobileread.com is a better bet for checking out whats available.
The Hanlin v3 eReader is about 2300RMB +- 200 here.
I've pondered buying one, but find that iPhone or Laptop are just as useful for my purposes, and they also have color screens.
Color eReaders are expensive, and the full screen refresh times are in the 10 second range, vs 3 seconds for b/w.
I will probably be getting one in 20 years, when they get the tech cheap enough.
I'm envisoning comics being distributed like that - my holy grail is a hi-res color device - something at least 1900 x 1600pix that can do cbr's natively with swipe gesturing for page view similar to the iPhone photo app.
My 46" 1920x1200 is a good substitute for the moment though, although japanese small text scanlation manga is a little small to read still.
Thats still a few years away though.