Two suggestions...

[joximu]

well, I couldn't test all of them :-/

To SysCP 1.2.16: the concept is very likely to ispCP - except oft fastcgi. The possibility to install somewhere and then getting the options via web interface which have to be written into the different config files I liked very much. For me they did the best separation control panel <-> official/standard packages.

I couldn't install ispMan (because LDAP is still to less important for me) - the concept really seems to be also for big players...

ok, to have a good overview, it'd be nessesary to have a closer look at the more than 20 FOSS control panels... hm... is there someone having the time???