A vorpal whip sounds excellent.
Being prone gives enemies +4 to hit you with melee attacks, and you suffer a -4 to your own melee attacks. Ranged attacks are either unusable or suffer no penalty, IIRC. You don't lose Dex bonus.
Do bane & wounding properties have to actually hurt the creature in order to kick in? A whip with those enchantments probably wouldn't be that useful, due to the whole "can't penetrate armor" problem.
The elemental/alignment based enchantments are probably the way to go..
Distance is an amusing one, and arguably allowable in 3.0. Probably a no-go in 3.5, though.