Hi !
I have been on looking for a Sony PRS-650 for a few weeks, but there's no way to put my hand on one: they're out of stock everywhere

!
Now... I looked around an thought: how about the NOOK ??? Cheaper, easier to find/buy...
What are the differences between them, considering the fact that I will NOT BUY ebooks, but use FREE ebooks available on many sites !
Thanks in advance for your tips, advices, etc...

J-P.