Look at the Line6 Verbzilla. As it's name suggests, it is a monster of a pedal, and pretty good value too. It'll do anything from a hint of subtle reverb, to all sorts of weird and wonderful reverb effects - espec the "Octo" setting. For me, it's the only Line6 pedal that I would use.
Just remember that all the Line6 pedals seem to work much better, with less noise, if they have their own dedicated PSU.