Enterprise FTP Servers

Looking for a viable FTP solution with web functionality and enterprise grade feature-set.

• http://www.zftpserver.com/
• http://www.wftpserver.com/
• http://brickftp.com
• http://www.cerberusftp.com/
• http://www.globalscape.com/mft/
• http://www.webdrive.com/products/titan-ftp-server/
• http://www.ipswitchft.com/ws-ftp-server