My suggestion is to learn how to use the camera you have. I can get bright, vibrant photos out of most any camera.
Best tip on the board!
Saying "which camera takes better pictures" is like looking at Word and WordPerfect and saying "which one writes better stories?"
Some cameras have more options, some are more versatile, some are cheaper and some aren't.
Don't fall for the megapixel hype. Anything over 6 will print a good 8x10. When cameras went from under 1mp to over 2 or 3 it was a big deal. It proved a good sales point, so they continue to push it. A full frame 35mm sensor at 8mp is going to be sharper and cleaner than a tiny point and shoot with a 14mp sensor. The ONLY advantage to the extra megapixels is the ability to zoom and crop and print larger images. But if your lens isn't great, zooming and cropping will magnify any blurriness or other problems.
If you know nothing about cameras your best shot might be a point and shoot with "scene" modes.... Sports, night, portrait, etc. The camera makes all the decisions for you.
A slightly more advanced, larger one may allow you to select your own shutter speed or aperture, etc.
The biggest advantage to SLRs is the ability to change lenses. Its other advantage is RAW mode, which lets you modify the image without the degradation that jpgs suffer under manipulation.