Looking for opinions of what amps in the fractal unit are the best for doing super clean to dirty with just a gain knob. I know most of the vox type amps do this well and that's not what I'm looking for. I am looking for suggestions on amps that would be good for higher gain hard rock and metal. Marshall and mesa boogie type sounds probably. I am looking for amps that clean up very well so I do not have to do x/y switching for clean settings to eliminate audio gaps. So far I found the marshall 1987x and one of the usa amps seem to work well. Any other amps I should try?