Eventide Space and Boss RV-6 all day! Covers all reverb needs, from totally spaced weirdness to more traditional reverbs (and delay). Also tried the cheap Zoom ones, but they are a bit too "advanced" with display/menus which I hate... I want a knob for direct access to tweaks. For spring reverb emulation try Malekko´s pedals, almost as good as a real spring.