There are three most popular e-readers in Russia: Amazon Kindle (Touch or Keyboard), Sony PRS-T1 and Nook Simple Touch. There are even holly wars on the topic which one is the best on e-reader's forums. All three has a high quality screen (e-ink pearl).

None of them supports fb2 or djvu but there is a bunch of free software which can convert any e-books to any format. In addition most web sites which are used to get e-books can provide automatic conversion to any desirable format.

My notes:
Kindle is ready to display Russian books (.pdf, .mobi and .prc formats) and use English-Russian dictionaries just out of the box. The price is extremely low for the provided quality.

Sony prs-T1 can be modified with additional software to be able to read any formats (except djvu, djvu should be converted to pdf which is a one button pressing task).

Nook can also be modified with additional software as well.

Other two popular brands are Pocketbook (the only one which includes Lingvo dictionaries but old type of the screen and extremely high price) and Onyx (supports any possible format and some models are with "pearl" screen).