The B'Rel and the The K'Vort
The idea behind the wings in space, or at least on Klingon ships, is two fold. They give the vessel a theatening look, and both the B'Rel and the K'Vort are atmospheric vessels as well as space ships.
As far as naval looking ships go, check out these ships:
Pandoran Ship Set
[ March 04, 2003, 15:04: Message edited by: Atrocities ]