For laptops, definitely stick with Apple, wait until next year, and lump the cost.
I've done some reading, and even experts in the field of "hackintoshing" basically say it's a "science experiment" to attempt to put OS X on laptops. It can be tricky to accomplish, and even cruising such forums, there are lots of questions and
lots of problems.
As was said, not all models will work completely or properly, and almost always you won't have compatibility (especially with wi-fi, bluetooth, audio, and video).
Now, some models can be managed to run OS X almost completely, and with surprisingly little hassle. I did read the HP Elitebook 8740W makes a good candidate (and it too gets up to 90C under full load!

), but given it costs $3500, and a 17" MBP costs $2500, add $80 to upgrade to 8GB of RAM, and $100 for a 7200RPM HDD... (is the Elitebook worth an added $800, for - after adding in a a couple of kexts - 99% OS X compatible? Not really... especially when the 17" MBP offers better battery life...)
Lastly, I was a Windows user for nigh on two decades - I moved to Mac in 2009, and have no intention of going back to Windows without good reason (of which there is only one, and that's based solely on conjecture and not worth bringing up yet...)
P.S. I do, from most- to least- in terms of order:
* Photography
* web design
* Microsoft Office (Windows version, so I use Parallels)
* web browsing
* watching movies (no blu-ray, though, which is sad as I love the format)
* games (I'm trying to quit - too easy to become addicted to content consumption over content creation... of course, if everybody created and nobody consumed, just think of all those companies that would go out of business...)