if you want a hybrid digital tuna, the sony xdr-f1hd sounds better and has better reception than the other h-d suspects mentioned in this thread. (also has better reception than pretty much any tuna at any price...) but, it won't sound as nice as as a norrmal (wintage) non-hd tuna. may not be an issue for casual listening.
re: the (non-hd) tuna jtwrace is trying to sell, i own one and can wouch for its nice performance, but i wouldn't pay anywhere near that much for one...
doug s.