For a basic, general purpose camera you'll be happy with, follow this advice:
1.) Avoid any camera that has a huge zoom range. No one lens is going to do everything well and if it tries it will probably do nothing well. Keep it simple and don't try to get it all.
2.) Given the choice between two, get the one with the FASTER lens (lower aperture numbers)
3.) Given the choice, give priority to the better wide-angle part of the zoom range. You can pretty well ignore the telephoto end since none of them are going to be long enough (assuming you follow rule 1)
4.) The single most important factor is how fast the picture when you press the button (But unless you go with an SLR, none of them will be fast enough.)
5.) The way it handles and feels in your hands is at least as important as any of the specs.
If you don't want to concern yourself with all that, then follow this back-up advice:
* Just buy the most expensive Canon you can afford. (Yeah, there may be other good choices, but you won't go wrong following this advice.)
Take either of these approaches and you'll be happy.