logging scp

I'm in a situation where I want to set up a remote file server and give people i know and trust access to it so they can dl just about anything 24/7. My first instinct was to use VSFTP because, well an idiot can use ftp. But I'd really rather use ssh, and have them use WinSCP because their mostly windows users. However I'd like to have the logging capabilities that the ftp programs have so i can see what files were accessed,downloaded,uploaded,speed,all the normal stuff, IS this possible/where would I go to find it? MB