Scouts are also an excellent resource against bombers. One scout in a sector can pretty much guarantees that any enemy bomber in the sector will be spotted. In addition, scouts can also drop probes which can spot a bomber from 1250 away. Sniper rifles are unique among the other weapons in that they only raise your signature a little bit when fired. Since the sniper rifle's range is 900, this has some interesting possibilities.
Missiles are another weapon that can be fired while either cloaked or just too far away to be seen.