I would shop around for a good priced TnT or Banshee. I would avoid an i740. It's a low priced card, but just too slow. YOu can get a banshee or tnt for as low as 90.00 to 100.00 if you spend the time to shop around.
The Savage3D based Hercules Terminator Beast would be a solid choice. The Beast has the best of both worlds, performance and image quality. Also, I haven't heard of too many compatibility problems with Socket 7 motherboards. Take a look at www.pricewatch.com or www.killerapp.com to find the lowest price of this card, or any for that matter.