Good suggestions all, gents. Many thanks.
Up until now I've been using the built-in reverb on the Peavey XR600F powered mixer we have for p.a. From a previous time, I have an Alesis Microverb, so I'm going to hook that up to the Peavey and try various combinations - hence my probing for your ideas/suggestions.
GlennT: Wow! Echoplex. Boy that takes me back. We had an old German-made Klemt Echolette back in the day - a really decent unit that was.
Thanks again, guys.