Apple has 30% gross margin per item. Dell has 9% gross margin per item. When you buy an apple product, you are buying at an enormous markup, for the pleasure of owning an apple.
So yes, you are paying a premium (some would say you are getting ripped off, others would disagree) for buying apple items.
It all depends on whether or not you want to have dollars in your wallet or in apple shareholders' wallets.
If price is important to you, you should consider a PC. If price markups are not important to you, then apple is probably ok. How much is the $$ worth to you - that is the point.
I have both an apple and PCs. I am happy with both. I never had a problem with win XP, although the mac faithful will constantly bring that issue up. Actually, XP is pretty good.
I use the mac for different things - video editing, music, and keynote, which I prefer to powerpoint. I use the PC for other things, more 'corporate' where I think it does a good job.
If I had $2500 to spend, it would be on a cheap, loaded PC for $800-900, and an imac or powerbook for the other stuff.
I need both, I enjoy both, and I like both.
I alm also willing to accept the flaws in each system (there are several in macs and PCs).
Lastly, I am willing to accept the an enormous profit margin on macs because I like them. But, yes, compared to other computer manufacturers, apple is really marking up and selling at a much higher cost. Such is life if you want an apple. The best thing is to buy the 'value' machines - iMacs and iBooks if $$ is the issue.
But, yes, apples command a huge price premium which is all profits. SOme view mac buyers as suckers to pay this premium, and others don't. But you have to love that margin if you are steve jobs, and you have to hate it if you are a mac buyer.