Returning to 40k with a SM or BA army?
So after 4 years away from 40k I'm getting back into things. I broke out all my old models/units and I realized I'm at a lost as the army that I have. I started out with a SM army but I was thinking about transitioning to a BA army right before I stepped away for 40k. These are the units I'm working with...
SM Chapter Master or Captain (Assault On Black Reach)
Shadow Captain Kayvaan Shrike
SM Chaplain w/Jump Pack
2x SM Tactical Squad (10)
Terminator Squad (AOBR)
2x Assault Squad (10 with jump packs, 10 with interchangeable magnetic backpacks or jump packs)
SM Vanguard Veteran Squad (just 5 SM I did with extra parts, 2x PW/BP, 2x PW/PP, PF/SS, all with interchangeable magnetic backpacks or jump packs)
5x Extra SM with random weapons and such
So should I just stick with a SM army or do I have what's needed to start a decent BA army?