Dillon is the absolute best for a progressive. With a little practice, you can easily load several hundred an hour.
They have the best warranty in the industry (complete, noBS you break it, they fix it). I have only had to use this a couple times for minor issues in the 23 years I have owned the press. They sent the parts quickly at no charge.
Brass can be purchased from Midway and several other online stores. I like to pick up range brass, and this has accumulated quite a few thousand rounds over the years. It is amazing how much brass people simply throw away!