Finally, I have set out for a personal achievement of obtaining victories with more than 5000 points with every ship type, which I just completed with the two ships I most often failed before, the Stealth B and the Engi B.
I here present you my new high score list, including the three highest scores on Normal difficulty that I'm aware of (but lacking any competitors, it is a bit like winning women's ski jumping):

I've had quite a good run with the Vortex, so I did a couple of extra rounds, where I (finally) noticed that the visited beacons of the rebel territory always spawn the exact same type of ship - can come in handy when you want to avoid a specific kind of ship, like an elite fighter with three small missile launchers or three Burst Lasers Mk II.
And now I'm taking a break - at least until AE comes out.