For everything that you listed, you will need 2 different presses. The metallic cartridges will all be done on one press and the 12 gauge on a totally different press.
For the metallic, I would suggest the Lee Classic Turret press. It can be used in single stage, auto advance and manual advance.You purchase seperate heads for each caliber and swap them out. Buying additional powder measures (one for each head) lets you leave everything set up and speeds change overs.
The shotgun press, depends on what you want to spend. In my opinion, MEC makes the best. The Lee Load All II is very good inexpensive press as well.