Well.... the KH1 is my clean, JTM is my crunch, and i flip between the SL+ and Mr. Scary for lead. But I'm playing "low gain to medium-hi gain." I like the Marshall sound over the Mesa sound. Speaker selection also plays a big part.
My selection was slanted because I haven't got to try many of the stock modules out. I have only tried the Plexi and SL+ of the stock, non-signature models...