I would highly recommend a boss me-50 or any of the more recent versions. Very very easy to use and lots of fun
Well i had a nose down in the music department in the school i work in as i do the PA for concerts etc and they had a Boss ME-70. Had a play with it over a week and i realised i'll just stick with the gain and re erb dial on my amp.
But have managed to learn all but the solos in Death to all but metal and Crazy train.