Hi I'm currently running logic pro 9 on my 2009 15" mbp. It has a 2.8 ghz intel core duo processor and 8gb ram. i have the stock 500gb 5400rpm hard drive, and everthing else is also stock. So far it runs fine but i recently bought a 10-input interface I am trying to build up a recording studio with a dedicated recording computer and basically i want to know if buying a mac pro is overkill. Im considering either the quad or 8-core version and i would probably buy the computer more or less barebones and then upgrade ram, hard drives, etc myself rather than paying apple to do it. Eventually i want to be running 30+ inputs which would require atleast 3 firewire interfaces and be able to record on all of them at once if needed. So do i spend the big bucks for an 8-core mac pro? Also, what do you think about refurbished models, ebay or kijiji for buying?