Best maps for vanilla doom?

hi there,
can u recommend very good maps? i prefer maps with custom textures... that works with vanilla doom. i like to play on detailed maps, like phobos mod etc...
thanks, sin

The fact that a map is for vanilla limits the amount of detail that can be used, but the following spring immediately to mind:
Eternal (eternal)
Alien Vendetta (av)
Kama Sutra (ksutra)
Requiem (requiem)

The filename is in brackets, so to find Alien Vendetta in the archive, search for av.zip, etc.

BTW, I have responded more to your post than your thread title - though these would all be high on my list of "best"/favourite wads too.

You could also try:
Darkening (darken)
Darkening 2 (darken2)
Dystopia3 (dyst3)
Rebirth (rebirth)
Mordeth (mordeth)
Slayer (slayer) <- no custom textures though

All what Grazza said, plus

-Bloody Night.
-Punisher for a crazy blood bath (ala map 32 from Plutonia, made by the same author with the same style).

Give a look to the "ten years of DOOM" section, absolutly all the wads there are kick ass.

Also try Osiris (new textures, sprites, monsters).

As well as the two Memento Mori megawads (mm.wad and mm2.wad) insanely beautiful at times though maybe not the toughest wads around.