For models, the Bandai prepaint/electrified kit is pretty damn accurate, a decent size, but awfully expensive (and out of production).
The giant 1/350 Polar Lights refit model is the best, most accurate plastic kit of it ever made to date. It's not very expensive considering its size (about the same price as the Bandai!). But at 34" long and a couple hundred parts, it's not for the casual modeler.
The good ol' AMT/Ertl kit which has served us since 1979 has a plethora (I love that word) of accuracy issues, plus that hideous and inaccurate bolier-plate paneling texture. But there are a billion resin accurizing sets and decals out there to fix it.
Alliance Models has an awesome 1/1000 resin kit available at Federation models (dot com). It's the best resin kit in that scale of the ship, and has a detailed 1701-A shuttle bay.
Starcraft makes a 1/1400 kit, also available at Federation. Their resin seems a bit soft lately, though. I used a sacuer for a kitbash recently and it's sagging like a watch in a Dali painting.
And of course Polar Lights will be issuing a brand-new 1/1000 plastic kit in a month or two. The previews look awesome.