That isn't exactly correct about the Asian fonts and Kindle. Per the Kindle product page: "Kindle can now display Cyrillic (such as Russian), Japanese, Chinese (Traditional and Simplified), and Korean characters in addition to Latin and Greek scripts for certain file types." So, at least some Asian fonts/character sets are supported.
PDF support on the small 6" screen can be frustrating, so I wouldn't really recommend any 6" device for much PDF reading.
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