The time frame on this deal is about up (ends today - Oct 28th) but if you could stretch the budget, this would give you the very best of everything....http://www.bhphotovideo.com/c/product/1010978-REG/canon_eos_70d_dslr_camera.html
That's the 70D + 18-135 IS STM + Pixma Pro 10 ink jet printer, paper, shoulder bag, and a class 10 16GB memory card for $1249 after rebate.
The 70D autofocuses in video better than any other DSLR on the market, hands down, no questions asked. This is a camera that you will no need to upgrade for MANY MANY years.
That aside, the 20% discount on the T4i + 18-135 is likely the best deal out there for you at $588 plus tax (promo code ZOMBIE2143). It has the articulating LCD which I feel like is a great option to have on a DSLR, especially when shooting video.
The T4i autofocuses in video decently well, but it's a first generation of autofocus technology in video so in time, you will probably want to upgrade it. You didn't say how old your son is but the autofocus on this camera in video mode will NOT keep up with him running around if you're nearby (on a soccer field it might but not well).
Avoid the 60D. And I'm saying that as a 60D owner. It doesn't autofocus when shooting video which means YOU have to constantly focus the lens and it's a MAJOR pain in the butt. It's a fantastic camera, but does not fit your needs and experience level (you need some pretty impressive skills to be able to take good video with it - I unfortunately lack those skills so I never use it for video). Avoid the T3 as well for the same reason, no autofocus in video mode.