When I changed over to the iMac 27 one of the big selling features was the incredible screen. So crisp, and if you turn the brightness all the way up it's too much, which makes it perfect in sunlight. LOVE it...
LED backlighting comes in two forms: edge-lit, and back-lit. Edge-lit is good for general consumers, they don't really care about accurate colour, etc. They want "thin", and they want cheap(er). Back-lit is better for design, and plainly, a better monitor for techies. They provide more even backlighting and better colour reproduction, among other things. RGB LED (different from white LED) backlit IPS is the real bomb, and is damn expensive (compared with others).
Your statement pretty much holds the same as my current PC. Macbooks are getting more competitive though, which is nice (I like it more for the good quality build, rather than the OS itself. The OS is nice, Win7 is good as well.).
So for those mac knowledgeable (as I have only entered mac)... when I get my new 27" i7 imac, can that then run as a dual monitor with the 27" LED Cinema display? Can an imac become a split display like that?