If you like Stowa, there are various other people making flieger or dive watches. Timefactors in the UK have some nice ones: http://www.timefactors.com/precista.htm
ETA movements, good quality, well within your budget.
It depends on your taste. If you want a vintage gold dress watch, LeCoultre make some nice ones that sell for that price on eBay.
On the other hand, if you like the pilot / marine watches that are currently fashionable, you might...