aja wrote
My question is, are there any good multi effects that have no preamp section or amp models?
The TC Electronic G-Major comes to mind. In fact, also the other models they have in the G-range would suit the application (G-Force or G-System) but they're more expensive (generally considered best stuff available). The G-Major is on par with your amp in terms of sound quality and will set you back about 3 thou second hand. Manual can be downloaded from the website, so you can see what it can do.