Hey there,
I'm also a student. I work with video and motion graphics, and I'd definitely say that the BEST camera you could get right now is the Canon 5D MarkII, But in no way is that a bang for your buck...
When it comes to a well-rounded performance at a good price, I believe that the Canon T2i is your best bet.
The video capabilities of the T2i are at par with Canon's 7D (the model just below the 5D MkII), with a good range of frame rates, as well as the inclusion of pretty high-speed HD (not full HD), which allows for slow motion playback: 720p @ 60fps which, as far as I know, no other camera brand has. Also, the sensors are identical (as far as anyone knows).
At the price, you will be able to spend a bit more money on a better lens, which is where you'll really start to notice a good difference.
The Nikon d3100, which was just released is also a good camera. A little cheaper than the T2i. The only advantage I see in getting the Nikon is that it has AF (automatic focusing) when in video mode, but its performance isn't that great if you're looking for a polished, professional outcome.
Plus, it's really loud when trying to focus.
As mentioned above, Nikon's low-light capabilities are *supposedly* better.
I'm not too sure about the lenses available for this camera, though.
I don't really understand what Policar meant by the "fi ryou don't care about lenses, get the Nikon," but to me that sounds like Nikon has worse lenses.
Remember, the lens is just as important as the camera itself!
Honestly, I have nothing to say about the user interfaces themselves...
Here are two great reviews for the two cameras:
Canon Rebel T2i
Nikon d3100