Can't comment on the wood (apart from the fact they do look good!). I've got a Nalu AST & very happy with the construction & performance. It's been used & abused by a 110kg kook for a couple of years now & it's still in good condition.
As for (only) a couple hundred extra dollars...save it & put it toward the next board. Just sayin'

[edit] Paulvee, don't the new ASTs have the track? That's the main reason I bought mine - that would sway me as it's a great lightwind cruiser.