Font readability

This follows on from the comments about font readability in a previous post. In the following paragraph, each line contains the same words but is formatted in a different font:

This is the age of the train and bicycle
This is the age of the train and bicycle
This is the age of the train and bicycle
This is the age of the train and bicycle

The fonts for the four lines are:

1. Times new roman
2. Georgia
3. Arial
4. Verdana

Which font do you find the most readable? If you print out the post, is your choice the same for the printed version?