若不急着用，可以再等等，据说KOBO不久会有新的电子书装置出来，
尺寸是 7.8，比KDXG轻盈，但应该够读一般的pdf文件了。
我也有KDXG，实在太大了些，不容易携带。
http://goo.gl/MBiRmy
Kobo is actively developing a new 7.8 inch e-Reader called the Kobo Aura One.
This new device will be ideal for reading e-books, manga and digital
newspapers.
The Kobo Aura One will have a competitive advantage in most countries where
it will be sold in local bookstores. It will provide a larger screen than the
Amazon Kindle Oasis or the Barnes and Noble Nook Glowlight Plus.
There aren’t any details about screen resolution, storage space, or other
features in the FCC documents. But we do know that the device supports 2.4
GHz 802.11b/g/n WiFi, has a micro USB port for charging. Additionally, this
device is manufactured by Netronix.
Kobo is also developing a new six inch e-reader and has filed the necessary
FCC paperwork, but little is known about this model either.
It looks like Kobo is going to refresh their entire e-reader portfolio within
the next six months. They will have a new flagship 7.8 inch e-reader and a
cost effective 6 inch model.xxx

感觉携带时就用KPW就好，宅宅看时还是希望萤幕大些 ><

7.8读PDF 还是太小，9.7的iPad 是读PDF 大小最好尺吋，把亮度调到适合阅读，其实还行，Sony e-ink 13.3大尺吋那台不觉得太大了嘛

没看过实体机其实没有概念，不过看论文的话或许不错 (?)