The GL port really renders better graphic to the old game. But it is still not full 3D like Quake for example. If you rotate around the dead bodies, their legs will always point to you, because it have limited images in the game (so not really 3D, but still raycasting).
I did not try the different wads, but the Batman mod I tried some years ago worked okay on the classic ports.
In my video it replays the original MIDI files of the game with the GUS and Timidity libraries. It uses less resources to play MIDI than MP3. When Doom was released for first time, MP3 was only starting and not yet popular. Most of the games at the time are using the crappy MIDI than sounds worse than Amiga MODs.
Now that I watched the video with sound I know what you meant.
First off, for the note, there are advanced Doom engines out there that support true 3d, models and all, though I think sprites age better personally.
In regards to PrBoom plus, which I forgot this is not. You can actually use MP3 music, which is what I am using in my Star Wars total conversion. I absolutely love that old midi, especially when it sounds right. I also LOVE DOOM, but I've been playing it for so many years that my main attraction to it now a days is the HUGE Editing community it has and the projects they churn out, and for the fact that is is a VERY powerful, yet resource friendly game engine that I can use to develop my own games. Not only that but with the nice little tweaks, bug fixes, and Additions the PRBoom sources brought to the table, I am easily able to create something that does not entirely feel like plain old Doom anymore and more like Dark Forces\Jedi Knight. There are also little tricks you can do to alter enemy, weapon, item, and player looks and behavior. You can make enemies seem smarter, new weapons, you can add water with currents, wind, conveyor belts, 3D elevators, 3D rooms, translucent windows, door above door, etc.
I made a small video showing off a few of these features in a couple of maps I'm designing, but the iPod will not let me upload. I'll try to post it this week end.
In the mean time, I need to write the author of this and let him know the GL needs fixed, as some sprites and enemies are sunk a bit into the floor. Also if he could update this to PrBoom plus, you guys would have acess to the Mp3 and Free Mouse Look support that my project uses... But does not depend upon.
Though my project will not just run on Amiga alone, I still design this in my heart as if it were only going to be for the Amiga. Well and hopefully Haiku too!
(sorry 68k users)