My first recommendation is to get an RCBS lockout die.
http://www.midwayusa.com/product/536...s-lock-out-die
In order to free up station 3, you will need to use some kind of powder through expander die.
http://www.midwayusa.com/product/458...r-355-diameter
The hornady powder through expander dies often get bad reviews as they can be difficult to get set up properly. I use them for all pistol rounds that I reload. If you get the hornady powder through expander dies, you will need the hornady linkage part.
http://www.midwayusa.com/product/959...pander-linkage
Your press may have come with the linkage part.
Another really nice to have part is the powder measure micrometer. It is great if you load multiple calibers and/or different powders. There's different ones for pistol and rifle.
http://www.midwayusa.com/product/615...ering-assembly
At some point in time, you are going to have to have the case feeder. Probably not worth your "right" one though.
FtrPilot