In my opinion, the DNA 15 is too large for your system. The depth front to back is the same as a pro DSLR with an attached grip/booster, which is really a ton of space for a mirrorless system. The DNA 13 would be a much better size to manage, but of course the laptop will not fit.
I'm not sure how soon you need the bag, but there *may* be something interesting coming 27 days from now that could be of interest to you.
Can I ask what country you live in?
Peter
Tenba