palinka, this leads to the 940n specifications.
I note that this one only has D sub 15 pin input. You might like to think about buying one that had DVI input as well as the VGA 15 pin.
I use a samsung Syncmaster 940BF. It really is a good monitor giving excellant pictures. It does have both types of input. About £190.
Not sure if this is important to you or that you can source a 940BF other than on the internet.
Cannot comment on the Sony as I have no knowledge.