Dell bashing? I like dell-bashing!!
Ok so my view on this?
Mac and PC are already too bloated. The best choice is actually Linux. Almost nobody starts a machine in Linux. Most people will start with a Mac or a factory-built PC.

of people actually dual-boot their PC with Windows and Linux, by using the GRUB boot manager. That's my personal way to do it, as I run a Ubuntu 5.10 install.
Some advice about a new computer...
Steer clear of a Dell. The problem is quality. Dell, being the largest commercial distributor of computers, has outgrew quality-control. More duds are shipped for personal desktops and laptops, because so many computers are being made. You probably saw some of the "designed for you" and "your fingerprints are all over it" commercials Dell puts out... it proves they are attempting to escape the facts that they ship so many duds and have a lack of customer support (though I admit that 90% of the people rating CS are angry and won't let the CS help them).
So, my recommendation is to order from Gateway for home stuff, Acer, Toshiba, or IBM for more business stuff.
If you know how, make your own computer from parts ordered from whole-sale sites such as Tiger Direct and NewEgg.
If you make your own desktop computer, you should probably choose either a barebone kit (usually case, processor, processor and case fan, motherboard, power supply, and sometimes RAM) or a motherboard-processor (processors are normally OEM) bundle. If you got a M-P bundle, then you need to find a case (preferably ATX), power supply, and fans for your processor, and sometimes your case. Both cases you should probably add more RAM, as 2GB is a good amount to buy. Most of these need a deticated graphics card, so a nVidia GeForce 7600 would be a good mid-range choice (7300 for low-range, 7800 for mid-high-range, 7900 or 7950 for highest-range). Find a good size hard drive and a disc drive (preferably a DVD combo drive or a DVD burner, as they are often equally expensive to a CD drive)
Things to check for your mobo (motherboard) is for DDR2 memory, PCI express x16, and SATA connections. If it has a intergrated video system, then you don't need the Graphics card unless you will be doing 3D stuff like are going to get Vista or play games. It is nearly impossible to get Mac on a custom-built PC.