The most commen cpu is the i7-4800 and the most common video card is the nvidia 1100m although they do offer the 2100m. In the engineering fields and graphics processing fields, these are both lower end professional mobile cards.
I use the m4800 at work for software development it has the i7-4800 and the nvidia 1100m. Its an excellent laptop, over kill for writing software. I love the case and the 1080p display. The case feels sturdy is beutiful and what you would expect quality wise from a $1500.00 - $2200.00 US laptop.
I am seriously considering getting one with a slightly faster processor and the nvidia 2100m to use as my home work station as I do process RAW images from my Sony camera from time to time. I seldom play games...