refer to the msi website for detalied information on the k8n neo2 and what flavors exist. in a benchmarking/review of some athlon64 boards, thg found the highest overall benchmark performance and value with the k8n neo2, and it was up against other nforce4 boards. it's in thier motherboards&ram section, and was posted some months ago. the bottom line is: if you want an a64 system with an agp graphics card, the msi k8n neo2 is the board to get.
btw > epox generally makes lower quality products and consequently they are often lower in performance. given the cost of said msi board ($120 USD), it doesn't make much sense to get a different (and lower quality) board.