^ I had a Huntkey 250W ("Dynex branded 350W") that was of their low end series and it too did not have MOVs. FSP aren't the only one. It is almost exactly the same as the PSU is in this thread, on Badcaps:
LinkNotice how it doesn't have any MOVs. Fortunately, the Huntkey I had was connected to a power bar that did have MOVs so all was well. I don't think the absence of MOVs is a big deal unless you have nasty power spikes and surges in your area, which can be a problem, especially on a 230V line voltage.