+1 For the Mad Professor... I use it in my HERBERTS Loop... Really Natural & Warm. AWESOME!
This From Matt Schofield's page... One of the current Great Blues Guitarists:
Mad Professor Deep Blue Delay
"After a long and expensive search, going through just about every "stomp-box" delay, past and present, for something that could even come close to the great sounding (but high maintenance) tape echo units I love, I was very happy to find the Mad Professor Deep Blue Delay. (
http://www.mpamp.com/pedal)
The smallest and simplest little box I tried sounded the absolute best for my needs. It doesn't mess with my basic dry tone at all, which is very important, and using the pedal into the front of the amp (never been a fan of dealing with FX loops) the delay doesn't get in the way or "smear" the notes. Just subtle, spacious ambiance with the right overall character."
Roid RAGE