ECS P4S5A/DX+ GRAPHIC CARD?!?

I'm currently have a ECS P4S5A/DX+ and I am thinking of replacing my current graphic card Geforce4 MX440-SE for a better one in AGP 4X slot. So which graphic card will be reach the max capability of my motherboard. I am looking at 512 HIS X1650PRO Iceq? Any suggestion will be fine.