I currently use virtualbox too. If you can accomplish all your goals with virtualbox, then no need to move to vmware. Most businesses use vmware because it's been around for quite a while and you can get paid support.
hmmm...could you help me out with this particular problem-
you see i have an internet dongle, uses a usb port to connect. i can't get the device to work in virtualbox though! so no internet in my virtual machines so far :-p