Upgrade to 5D mark III or keep my 5D mkII and get a 70D as backup body for video?

[syrcular]

I currently own a 5D Mark II and love it but looking to expand to something with more video features like 60p. I love the image quality of the 5D and have considered getting selling my mark 2 and getting a Mark 3 but it's still pretty over my budget. Then someone had suggested I get the 70D, because it has the best video features of any of the canon DSLR's and also can act as a backup body for my 5D mark II which I can then keep.

Will the 70d give me just as good video image quality as my current 5D Mark II? Or should I wait and keep saving up to upgrade to a 5D Mark III?

[mtheory]

Personally, I recommend waiting a bit more and getting 5D3 in addition to 5D2. Having two full-frame cameras with RAW support and single stable of lenses would be my choice.