The multimeter spreadsheet hasn't been updated in years, so it is not of much use in this case. Also, I think it's slightly less useful for handhelds.
The 121GW has a lot of secrets that can't immediately be seen by looking at it, but all of the Brymen (BM models) DMMs pretty much give away their features just by looking at them.
Probably the best course of action is to just give us a short list of what you really are needing your DMM to do. Then typically a specific model will stand out.