Hi Asaf
There are ways to get Kindle to read books other than Amazon - Calibre is your friend

A friend of mine bought a Kindle DX (new one). He also has some right-to-left books (Arabic) which are no problem in PDF.
I think at the moment Kindle gives you the best bang for the buck. Unless you want to wait a while and see what Sony comes up with. I have a PRS-900 which is great, but I'd love to see the glare on it go away.