Just a quick update...
The base mesh is still in a semi-raw state (no thrusters, no welding, no deflector, no aft shuttlebay, etc.), but I think adding the pylons and nacelles is going to give the ship a much more finalized feel.  I've kept to the template images as closely as possible up to this point, but I'm hoping to pull in a significant Vesta-class connection with the pylons and possibly the nacelles.  I'm also considering something more Sovereign-like in that area since the Prometheus was likely an off-shoot of the Sovereign design program, but it all depends on how it looks during the modeling process.
I'm also getting a yearning to go back to the Palatine textures (though I'll have to do some educated guessing since I haven't heard back from Mark yet).  In the meantime: