What are you waiting for then, man? Get both before it's too late!
Oh, and congrats with the Shuttle.
Like Roland Rock, I too find the Shuttle (ShuttleMax / GBE) knobbage very easy to work with.
What I think has not been mentioned in this thread is that some, me included, find the Streamliner knobbage more demanding, meaning I feel one needs more time with it before being able to dial in the sound one hears in one's head.
It remains a very worthy addition to a Shuttle, and even to a GBE or ShuttleMax, AFAICS.