hmm, all of those sound really good, but my money would be on the ship that is a little more....lets say....imaginary.
A full Biological living ship. of course, what does this do in space? well, plant of course, yes, a plant if you will.
it would be....oh lets say...about:
*height of 1350m
an overal width at the longest point to be about 2000m
*PTA turrets, no, more like solar radiation cannons. penetrate measly sheilds with ease. (one or two of those, not to be over-powerfull)
*main cannon, not mechanical, but launches super heated beams created by two plates on the surface that concentrate the sunlight and reflect it into the "main cannon" kinda like a magnifying glass, but effective at all ranges.
*main means of flight..energy plates, transfer sunlight into pure, undonting energy.
*speed, hella fast...cant turn worth crap tho.
no means of sheild, and no collateral damage by incoming ships, a very hard carapace, 500000 ap, but no internal things get damaged until that goes down, once its down, the ship is no more than a cargo pod....that moves...
MY dream ship....not filled with people ethier, more along the lines of...aliens!! oh yeah, aliens, and/or predators...