One thing to remember in IMAC, light weight is not always good. Weight allows better penetration in high winds. In our region and I suspect most others, we will not even consider not flying until the wind hits around 20mph to 25mph and then we'll hold a vote. A 10lb plane is going to be hard as heck to fly in that wind.
We fly pattern contests in winds greater than 25 - 30 mph at times, with models weighing under 11 lbs. Not a problem. My 2M Prestige weighs under 9 1/2 lbs and handles high winds extremely well. In fact, lighter weight can work to your advantage. For example, when you are trying to hold a wind corrected vertical line, more vertical speed allows you to accomplish this with a smaller correction angle than if you are flying slower because of having a heavier airframe to haul upstairs.
What you really want is an airframe / engine combination that is light and powerful, which makes it easier to adjust the size of the pattern that you present in varying conditions. When conditions are calm, you generally want to be in closer and flying more slowly than when it's windy, where you want to move the entire sequence out and fly bigger, with more energy and speed. This allows you to wind correct more easily, and also hide bobbles and corrections better. When you have a heavy airframe, you lose this flexibility.