If you have never done so, check out the mod of the Fleet Action rules system (made by Agents of Gaming for its Babylon 5 Starship Combat game).
It can, in and of itself, be modified for more of a detailed ship to ship game akin to the Babylon 5 Wars rules set (also by AOG).
Check the mod out, including the pdf of a lot of TNG ships:
http://www.robertshome.org/trek/