I'd say any of the multi-purpose ships, like a Constellation Andromeda, possibly a Redeemer, since they talked about modules for that, or many other ships. I personally would like to see a stealthed out Super Hornet with EWAR capabilities, so you could sneak in and blind the enemies with some amazing music video before they get blown up by the Russian Roulette!
That's the way it goes with betas, all of the big guilds in EQ were founded by beta testers because we leapt far ahead of day 1 adopters with our foreknowledge of all the game mechanics (and occasionally exploits).
And that's something that would apply even moreso to Star Citizen I believe. I feel pretty comfortable saying that the (desired) scale and depth in SC is unprecedented. Getting a first shot at how it all works together is incredibly valuable.
I like though that there are potentially over 650k people with this knowledge, so the power won't be concentrated into an elite group. There were only a few thousand beta testers even in the final stages of the EQ beta, spread across all the servers.
I personally would like to see a stealthed out Super Hornet with EWAR capabilities, so you could sneak in and blind the enemies with some amazing music video before they get blown up by the Russian Roulette!