Thanks for the replies guys.
I have used both of these binos in field situations, (Some of the guides I work with have them.) and both are superb.
Currently I use Stieners, but only 8X30 power, they are very good too, however side by side there is no comparison to the Leica's and Swarovski's. Both power and light gathering ability.
What I'm really looking for is any bad news/ negative comments from owners/users of Leica and Swarovski, there just doesn't seem to be any!!