You'll have no driver issues with me around. Don't worry. Get what I have, exactly in my specs and you will love it. (HIS Radeon HD 3850 IceQ 3 Turbo HDMI Dual DL-DVI AGP)
If you can't find it for sale, get the ATI HD 4xxx line which is almost as good from Gigabyte or HIS as well. They lack a little compared to HIS 3850 because they all only use 128 bit memory instead of 256.
Let me know when you need help with drivers. No problem.
Just make sure you aren't running an nForce3 or lower motherboard. Which motherboard do you have?