I had a quick skim through Lugia's reply too
almost everything he says is spot on - almost always in my opinion
better to start without a planned case and work out the modules you want and the modules you need to support them + 20-30% free for expansion - rather than starting with a specific case
"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