Android: Best PDF ereader app

Problem

I'm looking for the best PDF e-reader on my ASUS Transformer - running Android 3.2.1. It has to support an offline dictionary, auto-removal of margins and a white-on-black reading mode.

Solution

Mantano Reader Free

Comparison

                                               auto      white
                           offline             crop      on
                           dictionary   free   margins   black
                                                         mode

Adobe Reader                 -          yes     -        -

Aldiko                       -          yes     -        -

Mantano Reader Free          yes        yes     yes      yes