Bobspez wrote:
Any idea what she likes (or would like) to shoot? That may be a factor. Landscapes favor FX, but she will need a wider lens. Depth of field and low light for portraits favors the FX with the f1.8. Birds and wildlife favor DX for the longer reach, but she will need a longer lens. FX and DX are both tools, so is the CX. They have their own best uses. It's like asking if a person should buy a sedan or an SUV. It depends on what it will be used for.
I intentionally left out what she likes to shoot. The option is FX lesser lens, DX with killer lens. if you had to make a choice...