I have installed webmin several times in the past, I have moved to whm cpanel because of the constant errors in webmin especially in the dns zones. However, for file management, ftp and general server management webmin can do the job perfectly. I am under your commands and ready to install it for you.
I currently managing two vps servers in heart internet running centos and whm cpanel, I also manage 5 instances of ec2 from Amazon running ubuntu and one of them has webmin without virtual-min. I haven't tried virtual-min and I guess it would have improved my opinion over web-min in general.
I also have over ten years experience in the LAMP stack plus, such as Bind8/9, smtp, pop3 and many more.