Need graphics card advice!

I’m using QNX 4.25.

No matter what I do, I cannot get anything higher than 1024x768 8-bit resolution using my onboard graphics in my Dell Dimension 4600. And when I popped a Radeon 9000 in, the highest I can get is 640x480 8-bit. I’m using a new Dell W1700 LCD TV/Monitor.

So, can anyone tell me what the absolute best graphics card is that I can buy and use with QNX 4.25 without any trouble, and get at least 1024x768 24-bit resolution? Give me the make and model and I’ll just pick one up off eBay. I’m dual booting QNX and XP, so I want the best graphics card I can get, but want to be sure it’ll work with QNX 4.25. Thanks.