Raising your own meat can be rewarding, especially if you love animals (I know that may sound weird to some people). I have muscovies. They aren't real big at 8 weeks, probably around 4-6 pounds. Compared to a Pekin, muscovies are slow growing. They also require clipping of the flight feathers if you don't want them flying. Once they establish "home," they tend to stay close by. This tends to work in rural areas, but not so great in urban areas. Muscovies are great foragers! Depending on how much land you have, they can get a lot of their own food foraging. If you want a fast growing, meaty bird, I would get Pekins and incubate them. Silver Appleyards are a good meat bird that also broods. Regardless of breed, once the ducks brood, they're done making eggs for the year which greatly limits your production. If you collect the eggs and incubate them, then you can get far more (some breeds produce up to two or three hundred eggs per year).
Rabbits are another option. They're quiet, clean, tolerate the cold well, and produce well. My Silver Foxes have sweet temperaments. New Zealands and Californians are popular meat rabbits, but don't always have the nicest temperaments. I highly recommend rabbits. When kept in a colony setting, it makes their care even easier IMO.