Another AIW 9600 Pro vote. Decent midrange gaming card, TV & FM tuner, video capture, and the retail Built By ATI has the HL2 coupon in it.
Or if your current card games ok now, just buy a tv tuner/video capture card. A Leadtek Winfast 2000XP/Expert ($50) works fine and you can keep it through each (AGP) video card upgrade.
I have owned 3 AIW cards, but I just got tired of losing the TV tuner/video capture abilities every time the card was no longer capable of decent framerates while gaming.
ABIT IS7, P4 2.6C, 512MB Corsair TwinX PC3200LL, Radeon 9500 Pro, Santa Cruz, Antec 1000AMG, TruePower 430watt