dp4 is probably best for Reverb and tied in delays with the verb...some nice chorus/compression. as for delays on there own hmm im still fiddling with it...i used to get nice delay from my quadraverb but sold it.

if you have 4 aux sends on ya mixer you can take advantage of the 4 separate efx at once.

ive only got 2 on my crudbucket behringer - keeps the sound crunchie but the pops shiit me...

im thinkin of gettn 2 guitar pedals. 1 distortion and 1 delay with sample/loop