@Sgt Rock and any others,
For Kill Team, I was thinking about the First Strike box, to get some Primaries Marines and the Kill Team core manual, then for my second round of purchases, Dark Imperium to expand upon my Primaris Marines (and Plague Marines) and to also get the WH40k rule book (bundled). Is this a good idea, or would it be better to get one of the pre-made Kill Team squads (ie: death watch) then the First Strike box?
I have a bunch of non-primaris Marines (need to finish painting them), so I was thinking of killing 2 birds with one stone (per se) with Primaries Marines in the 2 box sets I mentioned, initially the Primaris marines in First Strike would allow me to start playing Kill Team, while I finish painting the rest of my non-primaries marines for the larger 40k games.