My parents' first-generation 17" iMac G5 took a turn for the worse last weekend: it will boot through the gray Apple screen, but once it reaches the blue screen prior to the desktop loading, the screen turns dark blue, and the fans start blowing like crazy. Apple Hardware Test lists a Video RAM error. Although we're taking it to the Genius Bar on Saturday to see if it might be a covered or inexpensive repair, we're not all that hopeful about it. We'll likely be looking into a refurbished Core 2 Duo iMac from the Apple Store online. There appear to be several options at any given time in both the white and aluminum form factors. I know that the build quality of the Intel-based Macs has been uneven compared to the PowerPC-based models (growing pains, I suppose), so I was wondering if anyone has any anecdotal evidence of the aluminum iMacs having a higher build quality than the white ones, or vice versa. Thanks in advance.