I am sure I'll get some hate mail for this but here goes: PC/Mac is personal preference but since you are sequestering opinions they both have their pluses and minus. A few things I despise about Apple is that they charge retail list on everything as there's no competition such as with PC's (Windows), you can choose Dell, HP, ASUS, Sony and list goes on or even build your own like I did. More competition means better prices means more savings and more diversity. I also don't care for Macs as you have to do everything Apple's way - they remind me of AOL where you are led like cattle through a corral. I hear all the time my Mac's never break. Not true - they all use the same manufacturer's for hard drives, motherboards, power supplies, etc - It's the outer shell you are paying for with Apple.
More frightening is this link on a recent virus outbreak (april 2012) of the Mac: http://bits.blogs.nytimes.com/2012/04/06/widespread-computer-virus-indicates-mac-users-no-longer-safe/
Pay careful attention to the paragraph that begins with: "This is hardly the first time Mac users have been hit by a Windows-style computer virus. Last year, security researchers discovered that a piece of malware, called Mac Defender, had targeted Apple machines. Intego, a security firm, discovered Mac Defender on May 2, 2011. It took Apple until May 31, 2011, to issue a fix."
That's almost 30 days to respond to a virus outbreak while they sat there with their fingers up their you know what's. Pathetic and a somewhat of a laissez-faire attitude. Shame on Apple. That would not happen on a PC.
Sure PC's have more than there share of infections but a resolution may take a few hours not 30 days. F-secure anti virus guarantees to have a patch within 4 hours or less as one example.
Lastly, the old adage about Macs having better graphics is nonsense. That was true back in 1991 with Windows 3.1 vs. what the Mac had to offer. Take a look at any high end graphics/gaming card for a PC - they have come a long way and both sides are equally as good.
PC's have dropped a few bombs along the way but have cleaned up since. Win ME and Windows Vista - both were rubbish though I don't think you'll be looking at any of these. If you choose a PC get a Win 7 64 bit which can make use of up to 192 gig of RAM or you may want to wait for Windows 8 due out in the fall. Anyway hope this helps in your decision making.