There's a lot of discussion about this so far in various threads so I figured I'd start one to make it easier to find and discuss.
In X-Wing two cores is frankly a bit of no-brainer, you get a great deal and have a good number of commonly used ships to start your collection. However I'm not so sure that will hold true for Armada.
In X-Wing 3 ships cost MSRP $45. Core set costs MSRP $40, so right there you're getting a 5 buck discount. Then figure extra dice, damage deck, templates, ect... It's a great deal.
But for Armada, it's $100 MSRP. In that you get 3 ships, that will cost around $85 to $90 based on the costs of the other ships. We're also getting 10 fighters which would retail for $25 @ $2.50 per. So all told you're getting $10-115 worth of ships, so again a good deal.
But the issue is that you'll most likely want to buy at least one expansion pack of each ship in the core set for the upgrades that come with them. You'll also want to buy 1 fighter pack for each side you'll play, to get the other fighters.
Given the points for a VSD you'll be hard pressed to put 3 in a list and have an effective list. That means the value of the 2nd core goes down, if you have no use for that 3rd VSD. What was a $110-115 value is now effectively $70-85 value, because you "lost" 40 bucks. Also I don't think you'll have need for 14 squads of Tie Fighters or even 10 squads of X-Wings. So you're again losing value, because you are getting more ships that you may not have any use for.
Of course some people might want them for other reasons then game play. So the value of the 2nd core is a bit more subjective. But it's clear to me at least that the 2nd Armada core is not anywhere near the no-brainer that it is in X-Wing.
It's possible that when we have more details about the game this could change... But right now I'd suggest to everyone to think long and hard about it before you pre-order 2 core sets.