IMac or PC??

[Mferko]

for gaming its all about the PC, tho you could spend 599 on a video card alone :P

[Death's Sting]

I'm prejudiced .. I like PCs.. Macs are good , but way overpriced for what you get, and although there is a lot of pay software that is ported to both Macs and PCs, you'll find there is a vast array of excellent free and low cost shareware available for PCs that just isn't there for Macs.
Macs have been relatively free of exploits simply because they had such a small percentage of the user numbers it wasn't worth it for the scammers to target them . That has been changing and now some smug Mac owners have been finding out to their dismay they are also vulnerable. As long as you have a good anti-virus program, kept up to date, and practice some sensible precautions opening e-mail attachments and links, you are as safe on a pc as on a Mac.
Value for price , you'll find PCs offer considerably more than Macs.
Previous versions of Mac operating systems were often more stable than Windows ones were, but you'll find that has pretty much leveled off, starting with XP and now Windows 7 is every bit as stable as a Mac, and offers considerably more versatility in compatible accessories and programs.
Virtually all PCs now have at least a dual core processor, except for some of the most basic offerings.. Macs now use the same processors as PCs and can run both Mac OS and Windows, but to dual boot both you need to buy Windows 7 to install in the dual boot .
No thanks . . I'll stick to my straight Windows computers and pass on Macs offerings .

^This +1. My fingers thank you.