Instead of people doing separate replacement sets I think that the game would benefit more from a new basic set being made in corporation by a team of good ship makers with different strengths.
First suggestion for a Dream Team to produce new models, textures, lights (and perhaps even update the main shipdata):
Cmdr Wyvern, Ramon, Ramirez, Charlie and Griff
Sorry if I overlooked a talent

Other things might also do with an overhaul - LB may for example have noticed things that could be nice to have in some of the AIs during his work with those. And perhaps also be able to update the main script to fix the mission screen clash bug.
Besides that a general update of the interface and trading screens to make the visuals more modern (less Lego-ish) would go a long way to make Oolite look more attractive to newcomers.