The 8.24QC is only good for an 030 based machine (Mac II), anything built into a Quadra is probably better or atleast more compatible. I recommend the common but fast Supermac Thunder/24's for anyone who wants high resolution and acceleration in a 68040 equipped Nubus mac. One of these days I will get my hands on a 8.24GC, one of the few nubus cards I want yet do not have. The video on the 840av is pretty decent, better off with some extra VRAM for more color depth (which is what I did).
There are some early nubus cards that accelerate older non accelerated video cards but they are harder to find then an accelerated video card. I have a couple made by rasterops and they work well with rasterops video cards (card looks like it has a pair of DSP chips with extra RAM).
Still it is very nice to have a boxed nubus card with the manuals and original install drivers, if you have issues the hard to find documentation will be very helpfull. If you get bored maybe PDF the docs for those who don't have a copy.