Do you have any of these? The easiest way to get going on this and clarify your needs and demands is to just get a couple of the things you absolutely want the most and then figure it out from there. The good thing is that you already have a DFAM and a 0-Coast so you don't need a "basic signal path" to get started. You can just start picking up whatever you want to try that might add to what you already like and want from those. It's not adivisable to get it all at once - something always comes up to complicate things or necessitate a different module be swapped in. (For example, you'll either have to sub in a different low pass gate or hunt one down and likely pay way more than necessary for that LxD, since it's discontinued and sort of a cult item). Doing this gradually will give you more time to think and more trial and error period without the wasted time of selling things that don't make the cut or the overload of learning too many things at once. To me it almost sounds like you should start by experimenting with different logic modules and the like first, since that's the thing you don't currently have and seem most interested in. The oscillators and filters are probably good to have as well (especially the LPG if you want percussion that feels snappy and is easy to set up), but you can already make sounds and probably already understand that side of signal flow.

And pick bigger modules where you can. Not only will you find this cramped, but 2hp modules are just a nightmare to use in general. They work great in terms of their functions as far as I've seen but both the ones I had were tough to fit in a case. That's another issue here. All these small modules are going to create opportunities for ribbon cables and the like to make it harder to fit everything in (even if your case is more than deep enough). Some kickass modules are just small, but this exact functionality would be much easier and better if it took up roughly twice as much space (or more, but don't get too crazy).