Well as an alternative to the king trinity you should also have a look the F4's (as also suggested in this thread).
16-35/F4 VR 77mm thread 24-120/F4 VR 77mm thread 70-200/F2.8 VRII 77mm thread - due the the overlap this might not be very interesting, but if you need 140-400mm you could add a TC2xIII, at "little" cost and little weight.
They are very sharp, they will give you the same or shallower DOF as you are used to if you have a F2.8 DX.
In your age I would assume less (weight) is more So there you go, don't we just make it easy on you. Decisions, Decisions, Decisions