the point is not that FSO has to better than other actual studio quality games (who said halflife2?

)..that's impossible..we can't compare (on the graphic side) FSO to recent games, for obvious reasons.
The point is that FSO WILL be better, one day or the other, than actual games, for the simple reasons that it is an in-development project, and therefore it is in continue evolution:)
(ps: you can already jump between systems in FSO...in a certain way...)
now, about your galaxy: I don't say I don't believe you, but I converted recently a 10k polys ships with the weirdest intersections you can imagine, placing al the objects (40..) all in the same layer.
It took a lot to convert with PCS, but it got converted, and the game never crashed (but I haven't made some stress tests like you, placing 3 or for of those ships in game, I just placed 2 of em and looked at the results)
If you are having problems converting the model or if the model is crashing the game, then there is something strange, that MUST be analyzed, since it could be important.
Just find an FTP space and upload your files, I'm sure Bob (and others) will be interested in it, since such an high poly model is an excellent test for FSO, and the fact that it is crashing the game may be important to show some of its limits.