Hi, I was going to get a new MBP, I'm thinking the low end 15 inch, and I will want to run Logic on it. Do you think this MBP would be a good choice? One concern I have is that there is only 1 FW port and no express card. I was planning on getting a FW interface and external HD. I know I can daisy chain FW, but do you think this will effect the performance I am getting from my external devices?