mate I had a 2007 flow 10m, got it new as a beginner last season. After one season on it I figured that the bar pressure was really bad and the kite was not easy to manage and not very predictable. Also, the 07 flow is not a one-pump kite which really sucks.
I got rid of it and got a cabrinha switchblade 3 this season, best thing I have ever done.
I would guess that a switchblade 2 (2007) second hand would be about the same price as a 2007 flow, and well worth looking into.
I wouldn't worry too much about wind-range though, you can go up and down the knots on the rear lines as required and use the de-power strap.
Feel free to PM me if you want any more of my thoughts on the FLow 07 and what I found as a beginner.