The Dillon Square Deal is a good deal for me. The cost for the dies includes the shell plate and locater pins ($85) or cheaper on ebay. Comparing to a 550 or LNL it costs the same or more to buy dies for those presses plus the ($45) shell plate and locater pins.
Don't even consider the die changes a problem as you can buy extra tool heads fairly cheap if you want to save time. Even without them, as someone mentioned before, it only takes 10-20 minutes to set it up.
I can say the Dillon powder measure works quite well with ball and flake powder. My loads with Unique, Blue dot, Red dot, are as consistent as Bullseye, 231, HS6, H110, etc.
If you do purchase one, be sure to buy a few cans of compressed air to clean out the shell plate often. A few small paint brushes in different sizes also help when cleaning it up. Nothing to worry about, but it needs to be done.
You may have some trouble adjusting to the operation of the DSD overall as I did, but if you keep at it you will be making quality ammo in no time at all. When you realize how much you can load up, you may start taking advantage of the bulk buys and internet sales on components. The DSD is like raising 3 teenage linebackers and likes to eat a lot. If you buy one, you will be very happy. Best of luck to you.