Until A7V266 proves it's stability, A7M266 is the most stable non-oced, but will probably be replaced by A7V266. But oced, both Epox boards are more stable oced than boards like A7M, MSI K7 Master and others. But again like somebody mentioned, EPoX has another PCI slot and is significantly cheaper than A7M, if you want A7M, then I'd wait for A7V to be out world wide, but again both EPoX are probably the best ocing boards.