I'd definitely say the plexi. I clean boosted mine only with the output level on my EQ pedal and it can get pretty heavy. That was even with some cutting in certain freq's. So with that set-up I could go from clean to scream with a toe click a quick crank of my guitar's volume knob.
I have played the 1086, but the Plexi just sounds so good. Yeah, I guess my above answer might be a bit biased now that I think about it :roll:
Thomas