Well I watch them every week. It's an odd season with both Madrid teams struggling to find any form and fluency, so they are clear on top by just being a good bit more consistent. Barça give up a lot of chances and when it comes to the big games there is no guarantee of big performances from the RB position, 2 out of 3 of whoever the midfield starters would be or 2 out of 3 of the front three starters.
They've not been majorly tested this season so far to be honest. I'm hoping for another cup for Messi, but it will need him at his best to do it.
Anyways, let's hope whoever they get puts them out. The sweetest would be Man U, as that would drive them all crazy.