Buy a Sony Vaio Z series and get a freebie PS3 - priced around $3000
I know they are expensive laptops but they're pretty reliable and given these are all SSD machines, fairly fast. The battery power also outstrips the macbook air's.
If you get this on salary sacrifice its not a bad bargain given the price of the PS3 is just on $600. You need to buy the unit (from whereever) and submit a claim to Sony together with $25 for postage on the PS3.