I've always had a MBP, so my extensive music and photos collection can't live on the laptop. I've always kept them on 2 externals and suffered some slow downs due to the setup. I just ordered a 27" iMac i5 =) I'd like to keep my 130GB collection now on my iMac. I use a buncha photoshop/ Lightroom Was curious if I was to partition say 150GB for pics and 100GB for music if that would help out the computer at all? I really have no idea, just seems like the imac wouldn't have to sift through anything to find my pics when I go workin on them. Thanks in advance.