Beavis is right. You can opt for either using the Ultra Clear SP that cones with the Carbon Fiber pack or get an AntiGlare alternative. If you still prefer Ultra Clear, I recommend either the PowerSupport AntiGlare HD pack, that one comes with both Ultra Clear AND Antiglare HD SPs, or the Ultra Oleophobic SGP SP. The guys at MacStudio has that Ultra Oleophobic SP and it's the Ultra Clear type SP, and leaves very very minimal finger oil.
So in short, I recommend these two combination:-
1- Front = AntiGlare = PowerSupport AntiGlare HD, Back = Carbon Fiber = SGP Carbon Fiber Cube
2 - Front = Ultra Clear = Either the Ultra Clear PowerSupport SP that comes with the Antiglare HD pack, or for the most minimal finger oil while maintaining the clear look, get the SGP Ultra Oleophobic. Back = Carbon Fiber = SGP Carbon Fiber.
I prefer option 1 since I don't even have to wipe down my iPhone 4 anymore, the PowerSupport AntiGlare HD is fingerprint resistive. The Carbon Fuber back of course doesn't show fingerprint at all. Option 2 if you really must have the Ultra Clear look, with option for the best Ultra Clear SP in my opinion, the SGP Ultra Oleophobic.
Good luck!
great piece of info given.. wondering can we buy SGP Carbon Fiber Cube in kl?