The Joyo American Sound is an incredible pedal. I've had probably around a dozen of the Joyo pedals, and my American Sound was the only one that failed for some reason - I re-purchased it with really little regret. The "Sound" series is so good, I've actually considered purchasing some type of inexpensive amp with a power amp in (effects loop) for no reason other than to run the Sound pedals direct into it. For the time being, however, they seem to run pretty well into the "FLAT" setting on my THR10 for bedroom volumes.
The Sound pedals do have some hiss with them, but only if you turn the Voice and Gain knobs far in the clockwise positions. The British is probably the noisiest of the bunch. But all four of them can be set to a reasonable clean or cleanish tone profile to model that type of amp, and you can run a dirtbox in front of it if you need more gain, just like you would with a pedal in front of a combo amp.