Here's Tim Challies' list of recommended New Testament commentaries. Really pleased to see that both of Peter O'Brien's commentaries are on there, they are tours de force by all accounts, and my reading of them has helped me a lot. Also Moo on Romans. Not sure about Gordon Fee. Every time I've read Fee I've been disappointed by the concessions he makes to using culture to interpret the passage, so I wouldn't second those choices. But the rest of the list looks solid.
His advice along with it is good, too, and he has some useful links.