My next computer, but which one?

So I am struggling with the decision to get a new computer. The only part of the process that I’ve really decided so far is the fact that I won’t be building this one from scratch (I just don’t have the time to). I am going back and forth between getting a Dell with Windows Vista (or XP) or getting a new Apple iMac. This isn’t an easy decision to make for a few reasons. Here is a visual breakdown of the 2 systems I am considering:

As you can see, the Dell wins in more categories than does the iMac. Dell wins three categories that are especially important: processor, memory and price.

• The Q6600 Quad-Core will smoke the Dual Core, so the Dell definitely wins there.
• The RAM in the Dell runs at 800MHz compared to the iMac’s RAM running at 667Mhz
• The Dell also ends up being almost $400 cheaper than the slower iMac.
  • Note: With a 22″ LCD, the Dell still only comes to $1,459 which is $100 cheaper than the iMac

UPDATE: Here is another comparison that includes the 22″ LCD with the Dell. I clearly stated this above, but people apparently can’t read.

Now, I realize that the iMac obviously comes with a 20″ LCD, but that doesn’t really matter to me considering I have 2 perfectly functional 17″ LCDs that I plan to use. I also realize that some people will say that Vista and OS X should not be considered a tie, but then again I’d tell those people to lay off the crack.
Part of the appeal of an iMac is the simplicity of an all in one solution, but I don’t think that simplicity is worth $400. The Dell also has a greater possibility in terms of future upgrades, whereas the only thing I could upgrade on the iMac would be adding RAM.
My point here is that while the iMac may look nice, it’s still far more expensive than a comparable (or actually superior) Dell computer. The stigma of “expensive Macs” continues, and for good reason. Now I just need to actually purchase this computer (hopefully in the next few weeks).