I also recommend that you try to forecast what the camera/lens will be used to shoot.
If you are aiming exclusively (or even primarily) at still photos, your camera needs will be different from another photographer who is using the DSLR exclusively or primarily for video; and perhaps different from the photographer ho will shot video and stills just about equally.
There are some touted advantages that can be a disadvantage to some folks. Snapsort.com states an advantage of the 70D is "less buttons" because of touch screen operation. This may be an advantage to some photographers but, I detest touch screen controls on my cameras..
BTW: Adorama has the 60D body, refurbished (this is the way I purchase all of my DSLR cameras) for $539 (USD) while a new 70D (not available yet as a refurb) is $1199. That means a new 70D is well over twice the price of the refurb 60D. Is it worth that difference? Only the user can decide.
Here is a breakdown of the specifications differences between the 70D and the 60D.
http://snapsort.com/compare/Canon-EO..._EOS_60D/specs
Here is a breakdown of the specifications differences between the Canon 70D and the Nikon D7100
http://snapsort.com/compare/Canon-EO...on-D7100/specs
What do I shoot with? I use a pair of Canon 7D cameras which I prefer, for my specific still imagery uses, to either the 60D or the 70D. This is mostly because of the top-notch auto-focus for still imagery but, there are a few other important reasons for my preference. However, since this is a 70D vs. D7100 discussion (I threw in the 60D as a red herring). I am not going to get into my reasons for preferring the 7D...