This isn't going to stiffen your resolve, but I'll throw it out there anyway. Has anyone mentioned the dictionaries yet? You price things in Euros and tell us that you read in English, so I'd guess that one of the European languages is your native tongue.
The 650 has language dictionaries for French, Italian, Spanish, German, and Dutch. When you're not sure what a word means in a book, you tap twice on the word and a little box with the translated word pops up. Another tap and you're back in your book again. There are also two English dictionaries that will give you the word's definition. You can choose which of the dictionaries is your default. I haven't tried to read anything in other languages on mine, but believe that the Sony will display most European fonts.
Come on, you know you want it...