Drift Control Magnum series is very nice… Comes with a weight on the bottom of the bag so you can throw it into the wind. Because when your using it its usually blowing like hell. Also has ring of foam on top side. So the weight sinks, and the top floats up, and the bag almost immediately opens up. So your not there leaning over the side of the boat yanking on the rope to get it to deploy. It also has a nice float that’s included so it doesn’t sink into the lines. And a dump line. Get a big one for the front of your boat, and a small one for the back. It’ll slow’her down to a crawl in some gnarly conditions.
Since the impact is pretty light weight and fairly high out of the water. A 48″ or better would be my recommend for you. Again two is nice to keep the boat even.
Good luck