I see almost everyone skirted your question. Strange, huh?
I use several version of each. with lha and lzx, I would say use which ever version you have a keyfile for. DMS I can't remember - I'm on the windoze machine right now, I'll have to move to the Amiga and look.... I'll be back asap.
OK, I'm back - I see yet another user has avoided your question.....
I have = LHA v1.42R, LZX v1.21 (there are '020 and '040 optimised versions too, within this version #) DMS v1.11 Turbo (what ever that means).
There are newer versions, but I either haven't been able to find the key files for them, or have had problems with the "newer" version.
These version have been working fine for me, for quite some time. I do not know what the tech. differences are between these, and some "newer" versions, but these work.
Hope this helps.