Perhaps you should consider doing what I did. Go to a store and have them place a 15 and a 17 side by side with the same resolution you want to buy. They don't have to be Asus. Then visit the places you like to surf, like this website or Ubi Zoo and see what looks best. Also, you might want to try increasing the DPI on each screen and see how that looks. Then politely leave saying you want to think about it.