For what you pay for the Dillon, you can get a Hornady LnL, get some free bullets and be better off than if you'd of bought either the RCBS Piggyback or a Dillon 550. Here's a comparison of the LnL against a 650:
http://www.comrace.ca/cmfiles/dillon...Comparison.pdf
I didn't write this, but found it to be a very fair and objective evaluation.
If you don't want to spend the kind of money the 550 or Hornady LnL costs, I'd look real hard at the Lee Classic Turret presses. BTW, I've owned a 550 and got rid of it for the Hornady LnL and I also own the Lee Classic Turret. The Hornady smoked my 550 and the Lee is what I load my low to medium volume milsurp ammo on because of the inexpensive caliber changes, plus I keep my LnL free for high volume cartridges.
Regards,
Dave