Many people say to stick with BUILT BY ATI but I couldn't and went for POWERED BY ATI.  Couldn't find a built one for a reasonable price in Oz.  I did read somewhere that the Sapphire and Hercules still use the ATI s-video chips and connectors.  You could also get the Sapphire Radeon 7000 with 64MB DDR if you were worried about having lower memory.  Model number 1024-1141-01-SA  for NTSC, 64MB, 183/183, TVO.  
Cheers
-cdbrown