I'm needing to replace my G5 PowerPC desktop Mac. I was thinking about an iMac, but I came across a Mac Pro G0EM1LL/A for $1300. Is this a good deal? I currently have a NEC LCD3090 monitor so I really don't need the screen on the iMac, though if I bought an iMac I'd sell my 30" NEC monitor to recoup some cost of the machine. I don't have desk space for two monitors. Is the used Mac Pro a good price? How outdated is the architecture? I have several external eSATA drives that I could readily use with the Mac Pro; I'd have to buy USB enclosures if I buy the iMac. For about the same price to me (iMac and sell my monitor vs. used Mac Pro), which is the better deal?