I'll just add a little more fuel to what's being said the most often - there is absolutely, positively NO superior brand between the major DSLR manufacturers, which are Canon, Nikon, Sony, and Pentax. No one is better than the others, each has some particular features or benefits that might make them stand out for your needs, each has compromises that should be weighed to see if they affect you, each has different ergonomics and one might fit you best.
Handle them first to see what feels best to you. VERY VERY important - check out all of the features, abilities, and specific functions that may really be what you want - if you've never had a DSLR you may not really know what you want, but read up on some things that may be worth strong consideration. For example: in-lens stabilization vs in-body stabilization, video capabilities, electronic viewfinders vs optical viewfinders, differences in live view systems and how they operate, tilting or rotating LCD screens, various control differences, availability of a particular lens or lenses that you feel you would need, backwards compatibility with used or older lenses, high ISO ability, continuous frame rate...just to name a few. You might find out one of these things helps guide you to the best camera for you.
There are serious photographers, enthusiasts, beginners, amateurs, pros, snapshooters, and hobbyists shooting with all 4 of these brands. The best thing you could do for yourself is to consider them all, check out the offerings from all 4, leave biases home on the shelf, and honestly see what all these cameras have to offer you and how they feel in your hands. That way, whichever one you come home with, you can be absolutely secure that you got the absolute best camera for YOU.