I am a fan of the X-Die for rifle work on a progressive. It works great. I am afraid I am not familiar enough with your two Dillon selections to know if they accept standard dies or just proprietary. If they will use standard dies then I would think an X-Die would work for you too.
Last year, I wrote a blog entry about the X-Die. Instead of posting it in its entirety here, I'll just provide a link if anyone is interested:
X-Die