vscd: To sum it up... mirrorless is nice for small sensors and small primes. If you need your daily workhorses (24-70 2.8+70-200 2.8) the Mirrorlessconcept is nuts. At least for size/weight.
I would only consider the size/weight issue between DSLR and mirrorless if they are equal in image quality. I mean why would I pick a "comfortably-gripped" camera that has inferior IQ?
Had the DSLRs' IQ come close to the A7 mirrorless systems, then it would be valid to compare their handling.