I realize that AGP is going by the wayside, but I stay with it because there is no such thing as a PCIe board that has sufficient PCI slots. I can understand that a gamer might prefer this, but a anyone that needs and expects their computer to be able to do anything, they need PCI slots.
Out of curiousity, how many PCI slots do you need, and how many do you currently use?
I don't use any in my current system, and I have 3 PCI slots. I could use one for a sound card eventually. If I saw the need for a dedicated RAID controller, that would take a second one I suppose.