I've downloaded all the Doom/Heretic/Hexen/Strife models I could find, as well as the Duke Nukem Hi-Res pack (cool stuff in there), all of Wim Sitters levels and model packs (some good stuff again) and trawled through games like HL, MoHAA, RtCW, Q3A, Q3Rally, Q2, Q, UT and Jedi Knight 1&2 (I think that's about it) and yet I still want more.

The easiest formats for me to deal with are MD2 and MD3, but Milkshape can load many formats, so I'm not limited to those. An ideal thing for me to find would be a website called "www.all_ the_map_objects_you_ever_wanted_in_one_place_in_MD3_format.com" and, believe me, I have looked - and found surprisingly little - so I was just wondering if anyone knew of good sources for stuff.
Thanks.