Well, I would love to subscribe to Adventure FIshing but cant find them anymore so perhaps they folded.
There is Steve Cullen's mag (he is on here) which is pretty good and I do love The Field but, in general, all seems to be a rehash year in and year out.
The best mags I have read are a few in SA (skiboat) and America.
I was astounded in Hamburg Airport to see just how many mags they do for the German market - there must have been about 6-8 that I saw inc several for Fly Fishing. Go into a big WH Smith here and you are lucky to find one
Ben