I have researched Canon camera a lot so here's my suggestions.
At $650 is the Canon T4i.
This is an entry level DSLR
It has 18 megapixles
It can shot at 3.7 frames per second.
It has an articulating touch screen.
9 auto focus points
The biggest selling point about this is the price. That doesn't mean it is much worse though, it still has very nice image quality. One of the reason it is much cheaper is because it has an all plastic body.
At $1,900 is the Canon 6D
I dont know as much about this but it it has a full frame sensor and is in between the 7D and the 5Dmk III (the next one).
At $1,250 is the Canon 7D.
It aslo has 18 megapixles
The T4i's sensor was based off of the 7D's sensor
It has a magnesium alloy body that is very durable
It can shoot at 8 (I dont remember the decimal place) Frames per second
19 autofocus points
This camera is better for sports photography and fast moving things. Personally I would get this camera if i had the money. I have the T2i (an older model of the T4i) and I do DSLR video as well as photography.
At $3,300 is the 5D mark III
It has 22.3 megapixles
Wheather (not water )proof (it can take the rain but do try to avoid. the 7D might also be weather proof but I'm not sure)
Magnesium alloy body.
61 auto focus points
4.3 (i'm pretty sure thats right) Frames per second
This camera is pretty much the best of canons line up. There is also a 5D mark II that is around $2100 or something like that. It is similar but has a couple less features.
I dont have all the information to base your purchase off of but you should do a bit of research yourself on youtube.
In some of the videos below the review compares the T2i or T3i instead of the T4i but they are all very similar and have few differences.
Hers the videos:
http://www.youtube.com/watch?v=gTjW8aoTkjA
http://www.youtube.com/watch?v=C3-fHf0Y990
http://www.youtube.com/watch?v=OYif6YYVlAw
http://www.youtube.com/watch?v=fAmo3UP3mcM
http://www.youtube.com/watch?v=RCT-YMgjm9k
http://www.youtube.com/watch?v=xN7VXW9mKJw
also remember to look up videos on your own. DigitalRev on youtube has lots of good reviews and comparisons
And for lenses, just get a kit lens (they're not the best but they are still very good) that has some decent zoom.
This took a long time to type and I know there might be stuff that I didn't clarify but feel free to email me as much as you like with questions you have. My Email is DanielBonner2@gmail.com
This is a big purchase you are making and I hope i can help you get the best out of it. Thats why I'm giving you my email.
I hope this helps!