Looking for new pedal.

Want a reverb but have no idea when the EHX "Cathedral" is out? Can someone help me?

Also i'm thinking of getting an envelope filter...But i'm wondering what the difference is between the "Q-tron plus" and the " Riddle - Qballs"?

I'm big into post rock/metal....i watched the video on the Riddle and was very impressed. Has anyone used one?