The g5 is strapped for usb ports as it is
"Strapped for USB ports"? It has 3 on the back and one on the front! What isn't strapped? 5? 6? 10 ports?
The AGP is just that, cheap. It does not have the same results.
The PCIe models have MUCH faster and more graphics options, faster and cheaper RAM, FAR more expansion card options, much faster system bus, more on-chip cache, more energy efficient, a faster optical drive and TWO Ethernet ports!
Looks like cheapness is all the AGP has going for it.
The truth hurts doesn't it? You can deny it all you want but it won't change reality.