Although the 9" isn't a c-clip axle, the pressed on bearing design is not the "best" way to limp out of a long trail, nor the most trail friendly design for shaft replacement. It will work, but as opposed to breaking a shaft on the trail and sliding in a replacment shaft, you'll replace a shaft, bearing, retainer plate, caliper bracket, etc. For that matter, I have seen the "hub" snap off of a shaft at the bearing, which still leaves you tireless.
The 9" does have plenty of advantages, wieght, clearance, TONS of aftermarket support, and if modding dollar for dollar overall strength. But, for shear, low buck, slap it in, gear it, and beat the ever living hell out of it reliability out of the boneyard the D60 is the deal, unless you don't mind the diff clearance lost going to a 14 bolt FF.
Still I can't believe nobody has asked, since you're replacing the front, have you settled on a specific front axle yet? If you can score an 8-lug front cheap, go D60, if a friend of a friend has a 5 lug dana 44 for a case of beer put a 9" in it. Niether is a bad axle, both can be upgraded easily if your skiny pedal outgrows your axle shafts, and they're both dirt cheap as far as initial ivestment goes.