No matter how good the lock is, you must make sure the door frame is strong enough for the lock to matter.
Here is a fun example:
I'm a pretty big guy, 6'4" and about 270. I work landscaping in the summer, so I have a decent amount of muscle mass too. I came home from work the other day, and walked around to the front of the house to get the mail. My roommates weren't home, and the doors were locked. So with the mail in one hand I unlocked the front door and opened it with my other hand; promptly ripping the door moulding with the P.O.S. chain lock screwed to it off the wall. I didn't even push hard, but with nothing but finishing nails holding the trim to the plaster and lath, and 1" screws holding the lock to that......
The point here, make sure your cool locks are attached to the FRAME of the door. 3" screws should be the minimum here, and make sure they bite into the frame. Also make sure the frame is good and strong. 2x4s are OK, but several 2x6s would be better, or steel better yet. A strong door is a must too, a solid core type works well.
Some other good stuff for other renters out there:
Make sure the landlord gets the locks re-keyed when you move in. Most landlords won't have a problem with that, be cautious about the ones that do.
Make sure the maintaince people/landlord have your cell number, go and seek them out and let them know that you would appreciate being notified before anyone comes in to fix stuff.
Any problems that come up need to be addressed right away. If you come home and the repair guy fixed something and left you door unlocked, you need to get after him to make sure it doesn't happen again.
Get to know your neighbors, help each other out watching for stuff that doesn't fit. ex: If the normal repair company is ABC, and the van out front is from XYZ call the management, even if the guy is just looking around the building.