You are crazy. You want the 'SL2', or whatever it will be called, that comes with the sensor Canon just debuted in the 70D; the one with Dual-Pixel AF and far better processing/firmware.
And yeah, you also want the 40/2.8; more than that 50/1.8, that's for sure. The 40/2.8 was great on my 60D, and it's still great on my 6D.
Would be nice if Canon would bundle the SL2 with the new 18-135 STM- that's one neat lens. I'm considering getting one with a 70D or 7D II kit, and rounding that out with Sigma's new 18-35/1.8 Art, for video, action, and as a backup to my 6D.
Canon 6D||[24-105/4L IS USM|100/2.8L Macro IS USM|70-300/4-5.6 IS USM|40/2.8 STM|50/1.4 USM|85/1.8 USM|Samyang/Bower 14/2.8 Full-Manual Rectilinear Wide-angle|
Canon EOS-M|11-22/4-5.6 IS STM|22/2 STM|EF-M 18-55/3.5-5.6 IS STM|
For sale!|24/2.8 IS USM|