MetroMan:
That's exactly my point - if you are in the know and wanted to really upgrade or otherwise play with the various components of your system, PC is a far superior option. If, as you say, you wanted a system to just run like a consumer electronic product, go for a Mac.
Except of course Apple charges a premium for it. There are also some grumbling among Mac fans that the company basically pushes you to get a completely new system if you managed to outgrow a certain component (esp. GPUs). Like for example - if you have an older version of Mac Pro, you wouldn't be able to take advantage of Nvidia 8800 GT (the current sweet spot) - you wouldn't even have the option of upgrading your motherboard for it as it stand right now. Not to mention, the card carries an almost 50% price premium.
I don't think one platform is inheritly superior to another - it all depends on what your priorities are.
AoD