What do you want to use the virtual machines for?
VirtualBox is a nice addition to the ones mentioned, it's open source,
uses Qemu for the cpl0 parts, and seems to be quite actively developed.

Windows in VMWare wouldn't be a problem, but VMWare Player may not be your choice. The problem is that VMWare Server or Workstation have an option to install VMWare Tools, which enable SVGA and some other features.

Once VMWare tools are installed, the machine will run in SVGA even in VMWare Player. By the way, VMWare Server is free (i.e.: they don't charge you), so you can use it instead VMWare Player.

There are several reasons I need virtualization. One is the limit of 4 Primary Partitions on an IDE hard drive. I could try Logical volumes, but I don't know how to manipulate them with GParted or how to install multiple OS's into them. I have tried WINE, but there are some programs that almost, but don't quite work all the way.

I'm basically trying to get some of mine and my dad's old favorite Windows 95 games (Red Alert, Total Annihilation if I'm lucky) in addition to trying to get the SONAR Music/Audio Editor up for my dad. My dad has been forced to tie up a whole computer for the purpose of his music editing which he does for leisure. He would prefer not to tie up that computer and perhaps use it as a file server or perhaps an online Day of Defeat 1.3 server instead.

If possible, it would be cool if he could grab music projects/audio files from a virtual Hard Drive with Windows, bring them over to his Linux Partition to manipulate them with some other utility that the Windows utility can't do, and bring the files back over to the Virtual Windows Partition to edit them further to use features that the Linux audio utilities don't have.

Thanks Zup for the suggestion of VMware Server. I'll give that a try. From my first impressions, it seems that DOSBox is significantly faster at emulating a Virtual Machine than the VMware. Maybe its because I don't have all the features enabled that the VMware server has. How fast is that other utility mentioned by WD? I've heard BOCHS is horribly slow.

VirtualBox has a couple of things to do before it catches up with vmware. First, I've found vmware more compatible, and second, VB lacks an image mounting tool for their proprietary format that they tried to push. They added minimal support for vmware images so vmware images and mounting tool can be used or the annoying inconvenient hack method of trying to guess the VB image offset to use with imdisk. Since the most convenient thing to do is to install vmware to get their mounting tool and vmware being more compatible, you logically cut to the chase and use vmware.