Hello, so I'm thinking about starting armada. I was originally going to just get the core set and then get clone wars era ships from shapeways (I think the CIS ships look cool). But now I've decided I might as well expand on the starter set with an ISD and one of the mon cal cruisers (what is better to start with, home one or liberty?) and 1-2 of the squadron packs. As well as the maneuver tool and dice pack (these were recommended on another post I think). Most likely I wouldn't get everything at once, that would be pricey.

But I had 2 questions, is there anything else that is essential or adds more rules and where is a good place to get armada stuff (everywhere I've looked the squadron packs are sold out). Also I'm probably only going to play casual games with friends so I'm not too concerned with meta or op things. Thanks in advance.