As far as the Federals , the 20 gauge flight control wad seems to be a bit easier to work with for most shooters. The same wad in 12 gauge seems to fight a lot of shooters with their combo's.
So maybe the same wad is used in the 3rd degree load?
For no more of the price difference between 3rd degree and HW 7's ,i think the HW 7's are the way to go.
I've shot a few of the pheasant loads with flight-stopper in 20 gauge in a full choke gun and the patterns were very open,but just that one gun was tried.
looks like dawei has some chokes covered , should be interesting.