IMO, non-formatted ebooks don't really work for technical books. I have used kindle on iPad even, doesn't hold a flame to pdf on iPad. For normal sized kindles and kindles on android phone/iPhone, don't even start.

While the kindle DX is bigger, it's still not very nice for reading tech docs. I'd buy an ipad instead and use the PDF version (and I buy all my books ebook unless not sold that way).