well i use glasses , so i dont know if 3d glasses over my glasses would be comfortable , i'll play Wow , AC saga , maybe BF3 , chivalry ...generally MMO and something like that ...
what do you think about the 100€ price difference....i have the money for both , but i want to take the best decision
Really depends on how far you're sitting and how big you need it to be.. if you sit further, of course a bigger screen.
My monitor is close to me on my desk, so I have the 23 inch one, and I prefer more pixel density, since they're both only 1080P. And the glasses is a plus when you want to experience 3D gaming.