The Logic Off Topic list

Since my my first inquiry I haven't really recieved
the info I need. I'm very much interested in getting
the mac because I love logic and I don't want to go to
another program (spent way to much time on learning
this one) however 4 PCI slots just doesn't cut it. 
Someone responded saying there is a PCI expansion
module that I've never even heard of that's available
can someone out there tell me more about this unit!
Cost, were to purchase, downsides if any please.
                                     Many thanks
                                     The Stevepiece 

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