I suppose the question is, did you choose the 2D for its, er, non-torch applications of being a plausibly deniable blunt instrument. If not, then get something small and LED-ish, and if I was you I’d not tie it to standard batteries either.
Just like bike lights there are some very good far eastern torches now but finding the good ones can be hard. I have 2 old Trustfires which have been brilliant- very reliable, excellent beam etc, but I wouldn’t know where to start with new models. Fenix will give you a bit more assurance of quality etc but at a price.
Quite a lot of these modern torches can actually be a bit impractical- my cheapo XML torch has stupendous range but it’s tightbeamed and all but the lowest modes are downright glarey- bounceback off shiny surfaces etc can be annoying and it blows your night vision completely. Easy to be antisocial with it and accidentally glare other people For just normal torch stuff- walking around, camping- I think i preferred my old incandescents even though they made hardly any light. Brighter isn’t automatically better for a lot of jobs.