Thank you for all the great feedback. I think I might just pull the trigger on the 7D based on this thread. My primary use case will be my kids sports. Baseball, Football and Soccer.
Well I'd go 7D instead of rebel then, although I was never as impressed for 7D for soccer as I had hoped (actually felt the 5D2 center point with helpers with more trustworthy overall and the 5D3 is clearly better, I quickly gave up on the 7D the two times I tried shooting soccer when I had both 7D and 5D3 with me and went all 5D3). Had GREAT results with 7D AF for surfing though about as good as the 5D3 even and much better than 5D2 or xxD or Rebels. It also did pretty well for focusing on birds jumping around in trees and such. Having MFA helps a lot since for sports you really want the lenses 100% fine tuned to the body, last thing you want is tons more soft pics due to poor calibration on top. You also get a lot more fps, much bigger buffer, quicker trigger reaction, more handy on the fly user interface.
Hopefully you realize that a 24-70 would be woeful for baseball and soccer.
And it's not very wide on APS-C for other stuff, I often recommend Tamron 17-50 2.8 non-VC, athough since you mention basketball you probably do want something with ultra fast AF so I guess canon 17-55 IS would make more sense or maybe better in this one case the 24-70 2.8 (I wonder if the new tamron 24-70 VC has AF up to handling basketball or not though. The 28-75 2.8 certainly not and not quite ideally the 17-50 2.8 either).
You need something wayy longer for baseball and soccer. Day games or do expect to try for night soccer and baseball?
At this point since the 7D2 will be coming I'd get a used 7D and wouldn't pay new price or even refurb price and then you can sell it for a lot less loss if the 7D2 arrives late this fall or something and I bet the new 7D2 might cost even more than the 7D originally did so the money saved might help. If the 7D2 ends up with 5D3 AF it should be noticeably better than the 7D, if we are lucky it might have a sensor that has better low ISO DR too.