Just found out that E-readers are tablets too)

Need Recommendation : Reader.

Planning to start reading again after quite some time.

What's the simplest(cheapest) reader can I go for?
-Should not strain eyes.
-portable.
-Don't need any fancy feature (not even WIFI or market place)
-I do already have epubs of most books that I want to read.
-Should be able to bookmark
-while a built-in dictionary & light would be great, its not a necessity.

Dont want to get something higher end unless I get:
- Improved pdf experience.
- Hassle free way to read manga/comics. (mainly manga)

Looking for eReaders. I had one years ago, but I forgot it the first time I left the country and it doesn't work any more. I read near to one hour a working day, so I'm not that heavy of a reader, but I mainly read while standing in the subway and the books I choose are getting too heavy.

Anyone using Kobo readers? I would rather get theirs to Amazon's... but it seems everything is more comfortable using the kindles.

Please, debate :)