I half read a 2-3 page article about this. Basically it said all the slotted/drilled brakes are good for is a bit quicker cooling. If you get one thats slotted/drilled/both like crazy, it'll crack real quick. I'd get one with a few drilled myself, however whichever has teh biggest surface covered by the pad and caliper is the best way to go altogether for break performance. Its weird the way they are engineered...the way I've heard it, you could have a generic 9.5" brake but have (lets say for this example) a Brembo with 9.0". The 9"er may brake better. My Passat's brakes are really nice, one time I looked at the front ones. Average to a-bit-bigger sized, but the actual pad (although probably a 4 piston) was huge!

If I could, I'd go with a dual caliper setup. I just think thats cooler. Pet peeve of mine when someone gets bigass wheels but has stock brakes, it just doenst look right at ALL.