I ride the 138 severance (5-9, 165) and have taken it to hell and back. It is a very tough ride. I came up short on a transition once and was sure that I bashed-in the rail. It barely picked up a scratch.
Note that this board rides very well off the wake and does not have the dumpy feel off the wake like most flex boards. It is very stiff between the feet, but loves to bend and butter on the tips.