I must admit that I never have been a big fan of any Tube Screamers (independent of the version), although I liked the SD-1 to some extent. So I modified a real SD-1 to more bass and exchanged the silicone diodes to LED's, which made a much better sounding, more dynamically reacting pedal out of it.
The Green Reaper, especially in 316 and LAFF LED mode is the first pedal, which comes close to this sound.
I really like the idea of implementing differently modded versions / circuits, and they all sound good, very much depending on individual likes and with which other equipment you want to connect the pedal.
Also very helpful I find the global control section, especially the "to amp" switch and the "mix" control, which allow better adjustment.
The pedal also seems to work and harmonize well with some of my favorite amp sims, which is not always the case. Some gear sounds great alone or in specific combinations, but also can make things worse in other ones.
I usually don't use overdrive pedals very much, but this one seems to be able of improving the sound into a direction I like.