I have the Venev Orion series (6"), which is equivalent to the Scorpion series for KME, and also the Phoenix bench stones, which I think are the same as the Cerberus plates as far as the abrasives go. They're excellent. I definitely prefer them to the KME Gold series. My only reservation with the Cerberus series is that they're only 2/3" wide, versus 1" for standard KME stones. OTOH, the narrower width would be a bonus for recurves.
I think you'll find that the F80/150 cuts a lot faster than the KME 140, so better for reprofiling. And the full progression produces a near-mirror finish that looks better than the result from the KME Gold progression.