I was going to recommend the Gnu Mutants over the Flows. I tried both the Flows and the Gnu's last year. The Flow's didn't fit my boot as well and I wasn't happy with the toe cap. The Gnu's fit me like a glove. Putting the bindings on a board and flexing my head I could really tell the difference between the Flow's and Gnu's. Comfort and perceived control led me to the Gnu's. I haven't had a reason to regret the decision.
Like you, I'm a beginner/intermediate all mountain rider who rides with an expert skier. Getting in my board quickly was a priority when I made the switch from skiing to snowboarding last year.