Maybe this is a silly question, but I was considering an iMac and now wonder if the Mac Mini may be more cost effective. Aside from the gorgeous display, how does the Mac Mini compare to the iMac in terms of performance? I have a 24" Dell monitor that's still working great. Is the iMac that much faster? What about the video cards? Would an app like xplane be far far superior on the iMac vs the Mini?