Hi, welcome to the photography world!!!
I would like to give you a couple of general tips about buying your beginner camera.
The models you mentioned are great for beginners, because they are not very expensive, and they give you lots of room to learn. From the ones you mentioned I would chose the T3i or the 60D (probably this one), or if you are willing to consider a Nikon alternative, the D5200 or the D7100.
The other tip which is very important is...... if you are learning don't spend a lot of money on a beginners camera, instead save and invest on 'glass'. Most people think that the quality of the pictures is directly related to the camera, and it's true, it is, but.... and this is a big but...... the quality of the picture is mostly related to the quality of the lens...... in plain english, the shittiest DSLR with a great lens will produce better pictures, than a great DSLR with a shitty lens.
Another side effect of this, you start with a medium range camera, but you have great lenses, when you change your camera to a higher level one, you will be able to use those lenses.