First post here, and I'm going to say that as Whiteskin mentions -> try 'em both, get a good feel for them, look at the Apple.com site, read some Apple/Mac web forums & magazines, talk to others at Apple store, etc. Myself, I love Mac's - but, do not have one as of yet myself; that will be cured in mid-July after the next upgrade is rumoured to be made on the processor... I have wintels at home, at work, and on the road; why? mainly due to that is the only version that our tech support at work will support... Mac's are inherently "more stable", due to both their OS and to the fact that most if not all peripherals that attach to an Apple must be approved by Apple; versus any Tom, Dick, and Harry can add whatever that they so desire to any PC...
As earlier poster mentioned, there are more games, software, etc. for Wintels; but! there are ways around that -> Virtual PC, etc. can be used to "act" as a windows OS on an Apple; except if using the new G5's [its architecture will not support this software as of yet... MS, who now owns Virt PC, is probably not in any big hurry to make it so either...

].
In any case, I fell in love w/ Macs years ago, and am a big supporter of them, yet have not pulled the trigger to actually get one... silly, I know. But, in any case, they are "friendlier", "easier", and "faster" - > depending on the application.
The eMac, G4's, and the iMac are also so much cooler to look at then the grey/black Wintel boxes...

In addition, while the price may seem steeper, that is most likely only initially -> if do actual comparison of what you are paying for a PC similarly configured as the Apple, and also add in the built-in software from Apple [which is really a good deal in itself], you may find that the price is really not that different - and then add in the more likely friendlier, more robust Mac OS. Not to mention that as a new Apple owner, you have just joined a very fanatical, loyal, and warm-feeling group... you will NOT get that same feeling w/ a Wintel box...
One last thing, go to apple.com, and check out their switch page... that may help too.
Good luck!