I'm unsure why it's believed that the hardware used for Mac computers is superior to those found in PC systems. At one time long ago, yes Mac was famous for having a higher quality system. However, today you can customize computers with far superior quality components.
The average iMac uses the same brand and types of hardware found in the average Dell, HP, etc. Don't get me wrong, Mac laptops are still respectable and those who wish to use them have their reasons. But from a hardware perspective, they are not really any different than any other laptop. It's the Mac OS that makes it different.
There are a great number of laptops available out there now with dedicated graphics cards. If you are doing design work, this can be a major advantage and allow you a longer lifespan of your computer as it will be more powerful for future upgrades as needed. Asus is a famous brand and they have several notebooks with dedicated video cards, high quality displays, and some even with 7,200 rpm hard drives.
If you're looking at the true cutting edge of laptop raw power, there's nothing more powerful than Sager/Clevo. These laptops can be customized to be more powerful than your average desktop even with SLI nVidia dedicated video graphics cards, three 7,200 rpm hard drives, and much more. Still, if that's overkill they have more reasonable laptops with great options and power.
Where I purchased my Clevo D900K:
http://www.rjtech.com/nb17.htm worth taking a look at perhaps.
