I personally use Libo (Libreoffice) Draw for PDF editing.
I see there's an Inkscape integration with Emacs in the works. You seem to
need SVG edition for text (LateX), so you probably don't need this much.
In the end, it's all a matter of workflow. I've read about professionals in
different fields who use a suboptimal but perfectly working workflow, out of
habit, and because their focus is on the work to be done, not on the way to
do it anymore.
But Emacs looks too interesting to ignore, I can't help it :)
