Yamaha CS80

Hi,

newbie question here. 

I recently purchased a CS-60 in perfect working condition (funny story 
it was used for 10 years at a clinic to produce sounds and test them on 
test subjects for some experiments, didn't exactly know what kind of 
tests they were). It came with the foot switch and foot controller. I 
am quite happy with it, this is my first analog synth! 

I am now shopping for a great reverb/effect to complement this, hoping 
it can provide additional sonic possibilities. I am wondering if 
someone can recommend some good effects modules that would bring this 
synth to its potential, and maybe more...

cheers,
ocean