I have never had any issues finding a PCIe PowerMac easily and getting it shipped to me. Perhaps, because I'm in the US...
I also watch movies and the extra speed help. Wayfarer performs pretty well on this box as well.
Since I use this system for productivity every day, I want that to go as fast as possible.
I use 2 monitors 1 1080p and the other 4k, and I doubt the radeon 9800 could even handle it. I use PolyOrga, Iris, Wayfarer, vpdf, Pagestream, and Turbocalc (one of my 2 68k items I still need, let's hope Microexcel comes to the rescue) all at the same time on different screens. I really loved my Peg II and wish I kept it sometimes, but these PowerMacs PCIe systems are very well made and perform well, so until a better hardware solution comes out I'm gonna stick with them...
I will post a picture of my setup after I clean my office... :)