As you might have noticed, there are many loyalties running through the membership of APUG - ranging from casual preference, through educated choice, all the way (thankfully rarely) to near religious fanaticism.
The bottom line is this: the brand of the camera matters least.
But... you do have to choose one, right? Well, yes, you do. I would venture to say, that all the manufacturers make pretty damn good cameras (as can be attested to by the legions of loyal users). I would go further, to say that quality wise, there is little to differentiate a Nikon from a Canon, or Minolta, or Pentax (or whatever)
of a similar level (meaning, don't compare a Nikon EM to a Canon F1).
Where there are differences are in the marketplace. Go to eBay (even if you don't want to buy there), and clickon the 35mm SLR section. Look on the left hand side. The category is broken down further by majour brands. Now do the same for 35mm SLR Lenses. See what I mean? There is a definite drop off after the Canon and Nikon categories. This may be something to be taken into account when basically buying into a system. And this is what you are doing - buying the frist building blocks of a camera system. It should be the camera and lens on which you will build. Just because you are a beginner, and this camera is a learning tool, does not mean you can't have it as perfectly useful part of your future kit. Unfortunately, with production of manyof the affordible cameras being stopped for a long time, buying into a more numerous system will just make your life easier down the road.
I would suggest a basic camera and a better lens (using Canon for example, I would rather buy an AE1 with a 50mm f1.4 ssc than a A1 with the 50mm f1.8SC). That better lens will be a useful part of your equipment, one you will go back to, even when the relatively simple body will get relegated to back up purposes. And most of what sets the pro-sumer body apart from the entry level one are features you , as a "student" do not need. When you learn what it is you need through experience, you will spend your money more wisely.
These are just some thoughts - don't sweat any of this too much. As you can see, you really can't go that wrong no matter what you choose - there are that many good chouces out there.
As for me, I chose the Canon FD system. I have no need for AF, I always wanted a New F1, and becuase of the mount change (from FD to the autofocus EF), FD lenses are a relative bargain in the used market. That was my logical choice made simply because hey, I had to choose one. I own some Nikon gear, have shot Minolta, Zenit, etc. - and frankly, I have made great pictures with all of them, my favourite being with... the Zenit. So it really does not matter
Just get one and go out and use it.
Peter.