At my future brother-in-laws place I got to spend some time with HAWX and was surprisingly impressed.  While the combat was extremely arcade-ish, it was also very enjoyable.  Though it's been a few months since I played Ace Combat 6 last, I feel it compares quite favorably.  Instead of a convoluted story-line with goofy cinematics that make about as much sense as planes made out of badger fur, HAWX uses the Tom Clancy's license well to create an interesting story.  Definitely picking it up off Amazon soon.