Hi Lugia, thank you for your answer! I'm aware of the four-tier rack (I own a two tier) but IMO that's not portable and/or secure for touring: it's simply huge, because of the form factor when having the 3 Moogs in a tier rack with an extra skiff on top. That's the main reason I'm looking for a case: to put them flat with a lid (with the added possibility to keep 'm patched in the case).
I'll have a look into Clouds and other options, but I think the Arbhar is just the next step in granular processing. I don't really mind having bigger modules, but I get your point...
The Catoff looks perfect for my needs, with built in balanced line outs and expandability. It's also great to have two aux sends (for extra delay etc). Thanks for your advice.