I have yet to find a better transfer than Criterion, which uses a better 'original' print than Fox Lorber.  Most of Kurosawa's releases are of his older work as of now.  If you think the price is worth it buy Criterion, but like you I can't find anything better, or worse.  Overall the transfers are (my opinion) B's to B+'s. I can't see anything better coming out in the future.  So.....is the price worth it?  Hope this helps.