Well, I don't know iMagicOS, but vectorlinux is the fastest distro I tried without having to mess with compiling everything, or beeing an expert to use it.
It's based on slackware, so there's a stable base, and it adds some user friendly features like:
slapt-get (package manager with dependency tracking)
java out of the box
most codecs out of the box
dev tools already there
comunity (that's a distro feature for me)
speed (well, that's slackware's merit
Apart from this, being a small comunity gives me the oportunity to participate and help the distro.
Just my 2 cents
btw, Welcome to vl .