I went into a slightly out of the way camera shop in Bristol, & they were very helpful. The fella there recommended two websites. one of which is called luminous-landscape. I had a quick skim across & it appears to be excellent, full of product reviews/comparisons from a practical perspective. there are tutorials & other goodies which i havent fully explored. but the goodness is shared. enjoy, hope u find it useful :~)

Yea it's a good site. I've been checking it out for a couple of years now.