I agree with everyone above. You can't beat the Hevi-shot. I started using it in 2002 when Remington made it and I also have some of the Remington Wingmaster HD #4s. Drops them like a ton of bricks and way better than standard lead. When I'm out of the WM HDs, I'll be getting the Hevi-shot brand. As far as chokes go, when I switched to the Hevi-shot, I read that you shouldn't shoot that through a standard (lead shot) choke tube because those powerful non-lead loads will tear it up. Hence, a hevi-shot (non-lead) choke tube is required. Back then, I bought the Cabela's Hevi-shot tube and love it. Patterns great and is priced right (budget at that time). There are several great non-lead (also non-steel) choke tubes. If I had to do it over again, I'd get the HS Undertaker. I'll be getting that in the ported version for my daughter when she's ready.
Make the switch, you won't regret it!