Welcome to MobileRead, Kaan!
Your Sony is an excellent choice! I'm sure you will love it as much as I love my 700. If you have any questions or problems, check the Sony 505 forum before calling the company. There is a lot of information there that will save you the headache of trying to get to a real person at Sony. We've all been there at the beginning, so no worries if you think your question might be too basic. We are all happy to help.
Enjoy!