Just beware when pre-booking seats with Globespan.
Have flew on 4 occasions with them, pre-booked seats for 3 of the trips, and twice I have not been allowed to occupy the seats I have pre-booked. It is also against their policy to refund your fee's (unless you pre-book extra leg room seats), as the seats you will sit in (although not the seats you booked in advance), are of a similar standard
Cheers GSM