It'll be a close game for sure, over two legs though Real Madrid should be able to come out on top. Bayern are a strong team, but I don't know if they could cope with the onslaught from Madrid they're likely to face at the Bernabeu. Mourinho is a clever man and he will do everything he can to make sure his side come out on top.
Likewise for Barcelona, if Milan play like they did in the 1st leg vs. Arsenal or if Chelsea get their act together, over two legs they can be beaten. Nobody should forget that Madrid have a huge lead over Barcelona in La Liga, so Barcelona must be doing something wrong...
APOEL are going out. As wonderful as it is to have a Cypriot team in the quarter finals, they're out of their depths now. Basel discovered that in the last round with a 7-0 demolition at the hands of Bayern.