Me? I have a Gigabyte nForce 4. GA-K8NF-9. I like it and it was around $100.
For you? A DFI sounds great if you have the money. I hear MSI is good to. Any nForce4 SLI will work. DFI of MSI for OCing. Asus, Abit, Gigabyte also good, but not as good in the overclocking department.