Another satisfied Dillon owner here –
I’ve had my 550 for about 7 years now, and I’m very happy with it.
BrianEnos.com has a couple of good FAQs posted on Dillon presses which may be of interest:
“Which Dillon?”
http://www.brianenos.com/pages/dillon.html
“Dillon Precision FAQs”
http://www.brianenos.com/pages/dillonfaqs.html
Disclamer: BrianEnos.com is a commercial site that does sell Dillon presses. I have no connection with them whatsoever – I just found the information in the FAQs useful.