If your intention is to use a flash in full manual, you are better off with older but good flashes from Sunpak and Vivitar. You get more for your money as your not paying a premium for a Canon/Nikon's Ettl/iTTL functionality. More power, More external battery pack options (at better prices), simple settings/controls.
On the other hand, it might make sense if sharing with a compatible Canon/Nikon system. Also don't forget to keep an eye on trigger voltages to avoid damage to the camera.