https://www.mobileread.com/forums/showthread.php?t=46376
And I think you can "live with" a 9.7'' screen, especially if you value paying much less for the DX. I find the Wacom stylus, expandable memory and folder organization invaluable, so the DX is not an option for me.
Your only reasons to hold off a purchase, IMHO, are:
1. iRex may drop its price.
2. Plastic logic might release a price lower than the DR.
3. Sony might announce a reader (possibly the same 9.7'' as the DX) with PDF support and memory expansion for much less than the DX.