If you want your Scouts to be really effective at tank hunting, give them 1 meltagun, 2 plasma pistols and melta bombs, and nothing more.
I'd also give more shooting weapons to your drop podding hunters, for example two more plasma psitols. With only a meltagun they are wasting a free shooting round.
Also the Bike unit is way too small.
You could also replace a whirlwind whith either a vindicator or a full las predator.
Otherwise your list is quite original