Short answer: I totally agree with @Lugia. Many other connoisseurs (including modular dealers...) have the same view.
Longer answer: my own and personal strategy, from the beginning, was little or no modules dedicated to drums. First, I was already well equipped (old TR-707, DrumBrute Impact, ADX-1, Volca Drum, Volca Sample, and now a brand new RD-6 :)
And by selecting for my modular Nebulae which incorporates a one-shot polyphonic sample player (within its alternate instruments), Disting mk4, Rings (great percs module too), and last but not least BIA, I was ready to achieve a whole bunch of drum sounds. Plus, more recently, I even added Plaits, LIP, and One. I think I'm a spoiled modularist, right?
However, I must admit that I am tempted today to conclude with two small 2hp modules: Kick and Hat only. Just for some modular techno sessions.
There is no conclusion here that is suitable for everyone.
I just wanted a modular instrument that was quite sound design (and random or stochastic) oriented.
It's all a matter of artistic direction and budget.
But I remain firmly convinced that a 808 or a 909, a Mini Pops or an Oberheim DMX, belong to a different animal species. They are like birds; you have to leave them alone, and not put them in sort of cages/cases :))
'On ne devrait jamais quitter Montauban' (Fernand Naudin).