I've got a Citizen Nighthawk. Cost £180 from duty free on BA. Great watch for flying and doesn't look too flashy either, just a nice plain stainless steel case and strap. Slide rule comes in handy, and so does the zulu hand.
Not being into expensive watches myself (don't see the point - they only do the same as a cheap one), I'd get a cheaper watch and spend the rest of her hard earned money on taking her on a flight out for lunch.
