http://lowendmac.com/video/index.html for all your NuBus video card needs!
Review says the 8/24 XLi sucks. (Note that it's really EITHER an 8 XLi OR a 24 XLi, depending on how much RAM is installed. Sort of like how the same Apple card can be either an 8•24 or a 4•8, depending on RAM count. (In fact, I'm pretty sure that every 4•8 can be converted into an 8•24 by adding RAM chips. Some 8•24's were made with socketed RAM, and some with the full RAM soldered on, though, so some can be 'downgraded' while others cannot.)
Review says the 8/24 XLi sucks. (Note that it's really EITHER an 8 XLi OR a 24 XLi, depending on how much RAM is installed. Sort of like how the same Apple card can be either an 8•24 or a 4•8, depending on RAM count. (In fact, I'm pretty sure that every 4•8 can be converted into an 8•24 by adding RAM chips. Some 8•24's were made with socketed RAM, and some with the full RAM soldered on, though, so some can be 'downgraded' while others cannot.)