What was the quality of the M8s? Do they compare to the VX-II or are the lower quality?
They are older scopes,and I'd say the newer fixed Leups have better optics today,but there is nothing inadequate about the M8's,which were (are)very rugged, lightweight scopes,able to tolerate a lot of abuse and recoil.
They are also very easy to mount because of the long tubes and lack of power adjustment rings,and while something of a pain to adjust and bring into zero, they don't budge once zeroed(unless they break,which don't happen often).They have plenty of eye relief.
I have done a lot of hunting with the 3X and 4X models,still have a few, still hunt with them,and would not hesitate to use one for about anything except low-light field sniping.They are a very practical, rugged, hunting scope. I keep my eyes peeled for them in good shape,and do not hesitate to buy them when available.
If you want a tough,no-nonsense scope without a lot of hype, they are tough to beat.