I plan to max the RAM this summer when I get a job smile
RAM is pretty cheap for this thing and it can take 16 GB which hopefully will be enough for me smile

ATI make a G5 Edition of the X1900

which means there has to be a ROM out there that someone pulled off the G5 Edition. the G5 I bought is only 3 years old which means its a 2006 model meaning that it is one of the most power G5s apple has made (the quad core one being the fastest). So its gonna be able to have lots of card options as long as there are ROMs

http://ati.amd.com/products/radeonx1900/RadeonX1900G5/index.html

it exists now I just need a ROM and I can just buy a PC one and boom.