Feeling a bit nostalgic about Doom 2 today, I really want to play it, but every time I go back to an old game, the graphics are always worse than I remember.
I know this post is quite old, but your best option is to use Doomsday Engine, it adds all the feature that you are looking for 3d models, better lighting, TCP/IP support for networking and the very needed mouse-look support.
If you are looking to play Doom 1 or Doom 2. This is what I would recommend anytime you got some nostalgia.
Screenshot of the engine below: