Anim8or is perfectly happy operating at Poser scale - that's how I use it all the time. It preserves vertex order and UV mapping. However it loses group and material information during the import/export process, so I can't recommend it absolutely. It may sound like an odd choice, but UVMapper Professional can delete geometry, and preserves all the important information. It's very easy to select by group or by material, or just by dragging a marquee in 3D or UV space. I often use it for quick and dirty mods to geometry, where no vertex movement is needed.