If I shot cast bullets as much as some of you guys seem to do I might consider it. As it is I only shoot a couple thousand a year at most, and only seven different bullets in all (and that number is likely to decrease when I finally run out of .357" & .410" gaschecks). The numbers may change when I retire in the next coupla years, who knows...but I really am not that put off with the idea of changing out a sizing die occasionally and the top punch is a non-issue. I tend to stick to casting a single bullet for consecutive weekends during cooler weather and make a whole bunch of them at once so it's not like I need to change out the sizing die frequently anyway.
At any rate, thanks for the replies.