Originally Posted by Masa

Sorry, don't take this the wrong way but buying mismatched tires is just stupid.

You are just asking for something to go wrong with with different grip levels in the front and rear if you were to come into a panic/inclement weather situation.
You most likely won't notice a difference in dry weather but when it rains, the channeling characteristics of the different treads could show.
If you MUST do this at least make sure they are either All-Season or Summer all around and not Summer in the rear and All-Season in the front or something.

Saving money is great and all but the one thing you don't want to be cheap on are tires... they are the ONLY thing keeping your car connected to the road.