Why are you on the verge of dropping "Aquaman" out of curiosity? I would say that it's been outstandingly consistent since the start, with perhaps a single sub-par issue in the second arc. This is what I'm reading currently:
-Action Comics (have decided to give Diggle and Daniel a chance after Morrison concludes)
-Aquaman (things are heating up with the Throne of Atlantis and Johns continues to do excellent work on this book)
-Justice League (which I recently picked back up, Johns is great left alone
-He-Man and the Masters of the Universe Ongoing (upcoming)
Once Batman Incorporated concludes in May I'll be back down to seven books, which is what I've been maintaining since the relaunch happened. Action Comics will be on a short leash under Diggle, and Superman already is with Lobdell...it's been surprisingly decent. I am just looking forward to the conclusion of this H'el arc. So potentially before summer starts I could be at five books.