I personally don't think the Expert is worth the difference. Between Deore 10 speed and SX 12 speed, I prefer the feel and durability of the deore group. Only other real spec difference I see is Alloy vs Steel steer tube and while the steel is likely heavier I don't think it will really make a big enough difference to justify the price.
That being said, with availability if you find a Expert locally available I'd tell you to pull the trigger and not wait for a Elite.
That being said, with availability if you find a Expert locally available I'd tell you to pull the trigger and not wait for a Elite.