Quick digression before answering. If you buy Snow Leopard and install it in the privacy of your own home with a custom bootloader and leaving aside improper licensing use, it's not hard to get an Hackintosh up and running (provided you stick to a shortlist of components known to work well, especially those that work without modified kexts... and provided, when there is a new 10.6.* update, you wait for someone else with an identical setup to report back any issues). Many new Hackintosh users get their systems up and running, then troubleshoot glitches and then run Software Update, which sometimes installs a 10.6.* update which sometimes, on the subsequent reboot, causes kernel panic at boot. Not having a grasp of even basic terminal commands they find themselves locked out, occasionally still the case even with a preboot CD. In short, if your partner is willing to be your technical support, that's one thing; if you are late handing in a paper or other assignment because you are having unanticipated Hackintosh problems, you rue the day you didn't buy a real Mac.
Even assuming you don't have a bumpy ride and you end up with, say, a Sandybridge CPU running on the 10.6.7 vanilla kernel and a cutting edge graphics card that hasn't quite seen its way into an as yet unreleased Mac, even if you did score a great deal on those components... the aesthetics of the Hackintoshes are still mind bogglingly ugly, in my opinion. Big wince. If you go the route of modifying a Mac Pro's case, it's a lot of work with a Dremil and other tools. Again, in short, with the greatest respect to people who like to tinker in the privacy of their own home, do you want a hobby or an Apple!