I know that some people may think I'm partial to it because I commissioned and helped develop it, but the SG MK22 is dead on to the 1977 two input Marshall JMP, IMO. It couldn't be any closer to the original. 60% of the time, I record it every time.
Same goes for the SG Rectifier/Diablo that was based on the "First 500" Rectifier design. Having owned and recorded an F500 for years, IMO, it's dead on as well.
I believe the Salvation Angel is dead on to the Engl it's designed after. After comparing my Engl to the Angel (and the Engl at that time was probably my favorite modern rock amp ever), I sold the Engl because the Angel was identical; I couldn't tell which amp was which in a blind test.
I think that the Jaded Faith SLO 100 is identical to the Soldano. It's an amazing module as well.
I haven't recorded an Rockerverb, Ecstasy or HiWatt in my studio but they're also extremely close, if not dead on, to my prior experience with those amps.