Fusion vs Parrallels, windows already installed and need linux

[BrutusMaximus]

I'm a CIS major, this semester i have Java and visual basic (i know, smart taking two programming classes) and intro to Unix/linux. Last semester when i took C++ it sucked having to reboot all the time for windows.

So now i already have windows installed on my machine, which one would be the better route. I've read plenty on both but i can't find anything about having the operating system installed already. I would hate to have to reinstall it all over again.

And as far as the Unix/Linux, can either one handle multiple operating systems...or would it be better to get one of the softwares, and use something like VirtualBox, for unix.

 

[ZBoater]

If you have Windows already installed via Bootcamp, both give you the chance to use that install as a source for a VM. I have Parallels, and really like how it is integrated into OS X. I cannot comment on the other because I haven't tried it. You should not need to reinstall Windows.