I make no claim to expertise but at this point in my life I'm happy with this one. I would trade a klondike bar for a 1Dx that syncs at 1/1000 without using HSS though...
But a light that throws out any decent amount of power will take longer than 1/1000 sec to do it anyway. The ultra fast quoted flash speeds are at minimum power, normally around 2-4Ws, or 15 to 30 times less than even a speedlite at full power.
Flash and high shutter speeds are a complicated affair, there is no simple solution other than no shutter, even leaf shutters have practical limits of flash exposure around 1/1000-1/1500. The true answer is electronic "shutters", basically no shutters at all, like the P&S's.