tonerider one's pretty good for the money, though to my ears it's better at the 80s hotrodded tones than more vintage marshall tones. at that kind of money you could get one pedal for the higher gain marshall and one for the lower gain marshall tones, though.
if thomann ever gets it back into stock, the harley benton/joyo ultimate drive might be worth a look, too- supposedly a clone of an OCD, and 29 euros. they also do an (alleged) crunch box clone for the same price. Haven't tried them, but they did fool a fair few tgpers in the whole freekishgate affair.
also really would like to try one of the cascading mosfet-based pedals (e.g. DLS, BSIAB), just to see what they're like. The soundclips are good, but obviously soundclips don't tell you everything...