Compared to Tony T and Billy F I'm a pretty ordinary photographer. However after working with some of the best throughout my time in this industry I've learned that if you want good, professional quality photos, avoid the little silver fixed lens cameras and get a good digital SLR. 99% of the pro's use either Canon or Nikon equipment so if you want quality, they're the names to ask for. In the end it comes down to what you can afford....both brands offer good cameras all through the range. I've used Canon EOS cameras since 1995 still occasionally use my first Canon EOS 350D which I've had for 6 or 7 years with no major problems. I recently bought a three year old top of the range Canon EOS 1d mK II and it's a whole new ball game to the little 350d, a shitload more bells and whistles and probably a bit much for a beginner. I'm still using it on the Auto settings myself.
I've been told by friends who know such stuff that the new Canon EOS 650D is a really great entry level digi SLR camera for the money (around $800 with two lenses) that with its 18 megapixels can produce professional quality shots.