When deciding between the Weight Plates and Bumper Plates you need to look at the type of lifting that you do.
If you are going to be doing the type of lifting where you are dropping your Barbell on the ground, Bumpers are the way to go. They are designed to have less movement on your barbell and are all the same diameter so that when they are dropped, they absorb the impact together.
Weight Plates are different diameters and are ideal for Smith Machine, Cable, or workouts where you the weights won't be dropped. They have great handles for easy transport or using them for adding weight to your body weight workouts.