I'm still of the opinion that drums don't belong in these sizes of builds. For one thing, emulating the voicing of a classic machine such as a TR-909 costs an arm and a leg. But if you don't have a full percussion module complement, then the drums just sound sort of random.
OTOH, present-day standalone drum machines are sufficiently sophisticated that they can replicate much of the functionality you'd find in a modular built that costs a few THOUSAND more. And you can get these with extra trigger/gate outs for firing off other events...which IS where you might want some accent percussion in a module or two. Plus, some have individual outs...with which you can separate and process each percussive separately.