For a groovebox-oriented setup, powerful but without too much complexity, the choice of Model:Samples seems excellent to me. And, at a lower cost, I would add a Volca Drum for totally different sounds. This amazing little box is like a small percussive synthesizer. And indeed, I would complete with the Blackbox for an opening towards wider sampling. Plus your DFAM... let the show begin!

'On ne devrait jamais quitter Montauban' (Fernand Naudin).