The last Nikon F3 I bought on eBay had the screen with the grid lines and not split screen (I forget the model number). I too thought it would be a pain, but now I like it, especially since it has the grid lines. In some cases I do prefer the split screen for accurate focusing.

As a side note, I'm a bit near-sighted. Would a diopter help me or are they for people who are far-sighted?