If you don't want to pay the outrageous prices for second-hand aircrew Seikos then try this latest offering from them:
Here's a link
Seiko watch SNDA57 Chronograph Watch they go for £150ish.
The latest aircrew watch is made by Pulsar (a cheap version of Seiko). Don't bother with this as it is total cr@p! I understand that it will be replaced with another Seiko offering next year (2010). Here is a picture of the Pulsar:
Here is a pic of the old Seiko version 2:
Finally, I have a Breitling Aerospace - I would not recommend anyone buy this watch if you intend to use it anywhere near water (despite its 100M claim); mine leaked in 6 inches of water whilst swimming with my 3yr old daughter in a Toddler's Pool!
Good luck with the watch hunting.
The B Word