My msd silverstone sound fantastic and is really quite versatile in terms of the voices you get out of it!
The Rat2 sounds good too;different but good.( with that one it seems that they all sound different so trying a few in the shop might be a good idea.
I want a cogeffects "knightfall" at the moment! http://www.cogeffects.co.uk/knightfall.php
and I'm keen to try the creationudiolabs holy fire.