I got the DX because I read a lot of PDFs and Word documents that don't fit on a small screen. It ended up being my favorite ereader ever. The big screen lets you pick a big font, which makes for a super-easy reading experience. The battery is a problem, though, yeah.
Same thing. I have the DX and love it. I can't complain about the battery, it lasts at least 3 weeks of 1 to 2 hours of reading every single night with the 3G off.
The only thing that pisses me off is that I could not find a decent reading light to accompany it until today.
I ended up using my IPhone a reading light which is not ideal.
I bought DX years ago and it is still among the most used devices, second only to iPhone. I wish Amazon would make it bigger, but now they don't even produce it any more. Let's hope someone would come in and fill the void.