Asus G73.
I've had mine for almost a year. I runs all the latest games smoothly.
I use this thing permanently at work and at home (it takes a LOT of abuse) and I've never had any problems.
It's still faster than the top-end desktops they provide me with on some projects (I'm a contractor).
At the time it cost me R16K, a similar spec. desktop would have cost me around R13K (So the "It's twice or 3 times more expensive" argument is bull****, unless of course you do the stupid thing and get an over priced Alienware Notebook).
Specs:
Intel Core i7 720QM (The new ones have Sandy Bridge so they're definitely much faster)
8GB DDR3 RAM
2 x 500GB 7200RPM HDD's (I use the one 500GB as an external now, with a 120GB Mushkin Callisto Deluxe SSD as my System Drive)
ATI Radeon mobility 5870 (Similar to a desktop spec. Radeon 5770)
Newer games I play that surpass the critical 30fps mark:
Dead Space 2
Mass Effect 2 (This one loves quad core)
Crysis 2
Battlefield Bad Company 2
http://www.asus.com/Search/?SearchKey=g73
http://www.youtube.com/watch?v=0uqrWyN86rI
Let me know if you need more info.