In response to the Topic Summary: Typo? AFAIK the K8V Deluxe doesn't have a PCI lock.
Boards based on the nVidia nForce 3 250/Gb chipsets are known to have a well implemented PCI/AGP lock. As for what manufacturer or what specific model, that varies depending on preference, however I'd personally go with something from the top 4 mobo manufacturers
e.g. ASUS, Abit, MSI, & Gigabyte comes to mind.