You're in a bit of a difficult position here, because neither option is all that inviting. Exalted 2 ed. is a system more broken than the French army in late 1918, with terrible, counter-intuitive, and awkward mechanics that are full of gameplay traps that will tear unexperienced player's characters apart, and a core rulebook that lies to you about how to design heroic characters.
Exalted 3E, meanwhile, is at the time of writing about a year late (and still hasn't materialized), and one of the two lead writers is fighting a battle with cancer on top of this. While they've made a lot of promises, there's no real indication that the E3E system is any better than E2E, and the material revealed so far has involved awkward mechanics (turn your d10's into d9's by re-rolling all 6's!) and a design-philosophy that seems to encourage bloat. And, keep in mind, Exalted is a huge game system, with six to seven major character-types (Solars, Lunars, Sidereals, Terrestials, Abyssals and Infernals, as well as the Alchemicals), each of which is supposed to have its own sourcebook. E3E then wants to add another three major character-types (Liminals, Getimans, Exigents). This is a system that is already a year behind its projected release date, so a "complete" Exalted 3E is probably going to take ages to materialize; even getting a few of the splats out will probably take them forever.
You're sort of stuck between choosing a system that is known to suck, and waiting for a system that might not suck. Encouraging, no?