I'm just making a note here for further elaboration. #1 a lot of the amp models are based on early Fender amps, which while not high gain, are also lacking master volume circuits (as part of the amp model, anyway) #2 getting a totally clean sound usually involves turning the volume way down on a non-MV model #3 level can be compensated by using the "amp out" level control, which is separate from the amp block's controls. #4 (I just figured this out last night) - when you use the compressor block, MAKE SURE IT COMES BEFORE the amp block. This was a real SMH moment - been using one of the 2 compressors, usually in "FX1", but never checked to make sure that was positioned BEFORE the amp block. FX1 can also be used for modulations, which I think are more likely to go after the amp block than dynamics. #5 The DC Modern Clean is probably the cleanest model I've found so far, and is supposedly a composite, not based on any specific real world amp.