Macbook Air - Is it a good time to buy?

My wife needs to change her laptop and we are thinking of going for the entry version of the Macbook Air 13".

As you know in April Apple made a quiet upgrade and dropped 100€ from the each model but since it was a quite upgrade and the design of the Macbook Air has been the same for a long time I'm now in doubt if there is a bigger update coming in the next 2/3 months.

What do you guys think? Any rumours of a Macbook air update in the next couple of months?

In any case I'm sure my wife will not care if she has the "latest" version but since I'll have to put down 1.000€ it would be nice to get the latest upgrade if the waiting time is only 2 months.