Hi I have used a Marshall JMP 1 since 1994 and it is awesome! i got it "used" for £300, it has never let me down in the 11 years ive had it, its been bashed around by airport baggage handlers and even tumbled down the carousel on its side (to my dismay) ant stanstead airport, still worked fine, i did briefly use the ADA, that was a great pre amp too, but not quite what i was after, cheers 5 thumbs