I want to buy a video card for my Gateway GT5034.It has a AMD Athlon 64x2 dual-core processor 4200+ 2.2 GB 2000 MHZ front side bus L2 cache 512KB x 2 4GB of memory, the add-in card slots are one PCI-Express x16,One PCI-E X1 , Two PCI Conventional. I just would like to know what the best or mid price video card would work in this machine, as I am a novice and there is so many kinds of video cards on the market. My PSU is 300watt's.I am most grateful for any help you may give. Thank you