[snakes1100]

Well, for the most part the ones you listed are all stable, its a matter of optimization and the ability to compile programs, with a RPM based system, you wont have that option, as rh or centos the rh ripoff use rpms, so unless you know how to build your own rpms or use custom rpms from other places or you know how to compile programs from source, you will be limited to whats on/off in stuff like php, were as rh/centos turn on a bunch of crap you dont need to use to run a vb site.

To fully optimize the server OS and its programs and get the most out of it, rh/centos is not the way to go, if you want to get the most bang for your buck.

But out of all the ones you listed, id have to go with debian or bsd.

I myself prefer Gentoo and its own package manager, highly optimized out of the box and one of the easier managers as it makes use of a make file to set flags.