Going up by 4x seems to make the most sense give the current market - looking forward to the update and to seeing this come to life.
The price increase is mainly to enable Ohad to invest all of his time in developing the project.
Therefore, a x10 increase is the right choice here, where future investors can purchase their coins on Bittrex.
Although the current distribution of Agoras coins is reasonable (
http://i.imgur.com/WOGjUAS.png), a x10 increase will continue the positive distribution trend, by enabling both small and big amount investors the opportunity to purchase in the same price.