I'm helping my brother upgrade his HP 754n Desktop. He wants a 19" LCD which is no problem,but he has to get a new AGP 4/8x vid card. His onboard "Intel Extreme Graphics" chip won't get it. I can get him a EVGA FX5500 128mb card for $27 shipped. Would the 256mb version be a big improvement or overkill. Or, would anyone recommend another card?