Apple is for some like Disney is for most people here. You give them all your money and apologize because you can't give them any more.
Seriously, and trying to stay out of the Mac vs PC religious zealousness, from a strictly technical perspective, Dell and Macs are essentially identical inside. Your choice between a Dell and a MacIntosh therefore is, as was mentioned several times in this week's Disboards podcast, is a personal choice of whether the extreme difference in price is worth it for you.
If you are not a computer person, I would try and determine what you are GOING to use your computer for. Not MAY use, but WILL use. I've seen far too many people be swayed by slick sales people into spending their hard earned money on systems that are far too powerful (an therefore expensive) for their needs.
Secondly, I would do some online research. Try and determine the marketing speak verses reality. Are you a person that likes to "go under the hood", or a "I just want to take it out of the box and it works" person. Don't be "afraid that PC viruses will turn your computer into a zombie 10 seconds after hooking it up to the internet", that's just Apple speak and has no basis in reality.
Thirdly, if you already own a PC (non-Mac), realize that you may need to repurchase software for the Mac format, or some software (especially graphically intense games) may not be available on the Mac side. Same works in reverse for Mac owners switching to PCs.
That being said, 90% of the people are doing the same thing on their computers. Surfing, storing pictures and emailing. For those needs I PERSONALLY would not spend the extra for a MacIntosh, but again, that's a personal choice. If you personally think that spending the extra amount of money is worth it for you, then it is.