I alternate between my 5" Libre Pro and the 7" Libre Color. I do find if I read for a long time on the color reader, it bothers my eyes, so I switch to the Libre Pro which is very easy on my eyes. Viewing comics, magazines, craft patterns and recipes is excellent on the 7" reader. I haven't encountered any problems switching the cards between readers.
B&H Photo has the Aluratek Libre Color eBook Reader for $109.95 shipped.
Read more:
http://news.cnet.com/8301-13845_3-20...#ixzz1HZpanUr5
I've never ordered from them, but they ship to Canada/US and accept Paypal.