i agree generally with the comments above. i would add that the Walker is still supported as a current product which has it's advantages. Lloyd continues to work at improving the design and there are various versions with particular upgrades.
OTOH you will still pay quite large dollars for even a used Walker, whereas the Goldmund Reference sometimes goes for much less.
ultimately these type questions come down to performace at particular levels of investment. the Goldmund likely offers the potential of more bang for the buck if one purchases the right one. while the Walker likely has the higher pure potential performance (particularly if Lloyd gets involved in the set-up).
that's just my totally subjective viewpoint.
OTOH you will still pay quite large dollars for even a used Walker, whereas the Goldmund Reference sometimes goes for much less.
ultimately these type questions come down to performace at particular levels of investment. the Goldmund likely offers the potential of more bang for the buck if one purchases the right one. while the Walker likely has the higher pure potential performance (particularly if Lloyd gets involved in the set-up).
that's just my totally subjective viewpoint.