Help..need new digital camera

[goddessily]

HI, I need to get a new digital camera asap. I need a camera that i can use to take pictures of my 1 yr old son and for my husband's landscaping company. I'm currently looking at the nikon d50, canon rebel xt, panasonic fz30 or canon s3 is. I need something that's fast (dont' want to wait until i can take the next picture) and something that takes good quality pictures. Zoom is somewhat important, but i was told that if the camera takes good quality pictures then u can always crop and zoom without loosing quality if it has a good lens. Please help.