I've got the EHX Holy Grail and most of my amps have spring reverb but right now in order to get deep spacey verb I have to mix the reverb + delay + phaser? etc. The less buttons I have to remember to push while gigging the better. And I like the fact that the phasing only happens in the tails. Im thinking of ordering some rub-a-dub reverb boards and some cave dweller delay boards and do some playing. Problem is I have more boards than I have time or hardware.