David, I cant help as I we both always use a mac for photos and videos. I find iphoto brilliant. We dont do a lot of manipulation, other than cropping, red eye removal. etc, . I think it spoils things when something has been obviously photoshopped . It becomes art instead of photography.
On our last liveaboard trip to papua new guinea, there was a photo comp on the boat on each trip. We had done three back to back. My OH won the first one on the Great Barrier Reef, won the one around new Britain (Kavieng) and then when presented for the final one , there was a great clapping of hands for his, and the winner was.... an american. There was a stony silence. I was waiting to someone to pipe up that a mistake had been made, but no the free bottle of wine went to an american dentist. Some privately told OH he had been robbed, but I suspect it had more to do with the size of the tips expected from the group of californian dentists.