5-foot step as part of Readied Action?

[Yora]

Assuming I am under attack by an enemy with Spring Attack, high speed, a reach weapon, and a high modifier in Acrobatics:

Could I ready an action to make a 5 foot step and make a single attack as he is breezing by? Or can I only ready a movement and hope that he fails his Acrobatics check?

[Michael Sayre]

You can ready an action to take a standard action attack, and as long as you haven't already taken a move action this round you may take a 5 Foot Step as part of that Standard action, so you should be able to pull this off.

[Dominigo]

From the PRD:

"Readying an Action: You can ready a standard action, a move action, a swift action, or a free action. To do so, specify the action you will take and the conditions under which you will take it. Then, anytime before your next action, you may take the readied action in response to that condition. The action occurs just before the action that triggers it. If the triggered action is part of another character's activities, you interrupt the other character. Assuming he is still capable of doing so, he continues his actions once you complete your readied action. Your initiative result changes. For the rest of the encounter, your initiative result is the count on which you took the readied action, and you act immediately ahead of the character whose action triggered your readied action.

You can take a 5-foot step as part of your readied action, but only if you don't otherwise move any distance during the round. "