If you're looking for a good SCP/SFTP client for your Windows machine, WinSCP is definitely worth checking out. WinSCP is a bare bones app that can handle your SCP/SFTP needs - i.e. it is a can handle secure FTP connections.
I haven't played with WinSCP in a little while, but I used to use it all the time. I hear there is a way to work with files "live" on the server, just as I was describing in my Text Wrangler post. All in all, this is a small app that can handle your file transfer needs.
If you're using more [unnecessarily] complicated FTP programs, you may want to check this one out. After all, SFTP is a pretty simple protocol and you don't really need a large, bloated app to manage it.