I just took a look at your rack - the public one in your profile
it's not just vcas you need it's utilities in general - in fact I would go so far as to say it needs nothing but utilities and maybe another modulation source - even if you take the dfam out in the future - there are enough feature modules and voices
good luck with the hunt for a quad cascading vca... might be worth looking for a used one and/or try wigglehunt.com! I just looked there are a few originals about new and used - the older version of veils is a great module if you can spare thee extra 2 hp (which you can!)
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities