[Arkady]

No, no, no. Don't panic.
A 6Mpi camera will easily do for print work as long as you process it correctly beforehand. Interpolate to about 12 -16" (according to the target audience)along the long side of the image at 300dpi and you'll be fine. Save as an uncompressed TIFF, never a JPEG unless you're transmitting it.
Although image libraries specify file sizes of 50Meg-ish for submissions, most publishers will go a lot lower if the image is one they want.
For magazine work, the biggest file size is preferable, but for newspapers and sunday supplements you can get away with murder.
Almost all of the images I've had published were sent as JPEGs (12" along the long side and only 175dpi, JPEG'd to about 9-10) over satellite comms.

Any of the cameras you've mentioned will do the job for you. And don't tell the wife, what she doesn't know wont kill her.