I finally broke down and purchased my new Mac; I got a great deal from Best Buy, who although had the sam price as everyone else, gave a free iPod Nano (1GB) model to anyone purchasing an iMac. It was a no brainer... I decided to get a 512MB RAM model, as I can purchase RAM separately and save almost 200$ in the process. As for the hard drive upgrade, all I can say is that I am satisfied with the present capacity, with the 250GB SATA drive currently installed.
As soon as I got it home, I unpacked it and connected it by FireWire, to my Cube. It took only a few moments, and I was able to browse the Cube from the iMac. I transferred all of my documents, data and files over to the iMac, then connnected it to the router, so that I could get connected to my Powermac. I proceeded to transfer a copy of my Music folder to the iMac, as well as all of my images and movies. With this transfer complete, I wiped the information from the Powermac and liberated almost 85GB of storage space. And with the ability to burn DVD with the iMac, I have been archiving some data on DVD; I may just have to pick up a pack of the Dual Layer DVD-R, with even more capacity.
So far, I am tremendously satisfied with my purchase. It is a very noticeable increase in speed and performance, as well as a definite upgrade where the monitor is concerned. Seeing the iMac and my old 17" monitor side by side really hammered that point in, with the sharpness, brightness and overall size of the iMac LCD dwarfing the 17" CRT.
More on the iMac once I have more information to report...