Well, Kindle is $259 and Sony is $273 at Amazon.com, so the price difference is negligible. Don't know about the screen quality, though. Real side-by-side comparisons would be interesting; assuming that Kindle is better, how much better it is?
How about Sony PRS-600? I'm in the same situation as you (thinking about buying an ebook reader in a non-US country), and the Sony seems to be one of the few valid alternatives to Kindle. It doesn't have that ugly keyboard and unnecessary wifi/3g connections. Regardless, with Calibre (http://calibre-ebook.com/) even blog reading should be possible.